diff --git a/Demo/parser/unparse.py b/Demo/parser/unparse.py
index 53b57b3..72691b5 100644
--- a/Demo/parser/unparse.py
+++ b/Demo/parser/unparse.py
@@ -1,158 +1,158 @@
-"Usage: unparse.py <path to source file>"
-import sys
-
-class Unparser:
-    """Methods in this class recursively traverse an AST and
-    output source code for the abstract syntax; original formatting
-    is disregarged. """
-
-    def __init__(self, tree, file = sys.stdout):
-        """Unparser(tree, file=sys.stdout) -> None.
-         Print the source for tree to file."""
-        self.f = file
-        self._indent = 0
-        self.dispatch(tree)
-        self.f.flush()
-
-    def fill(self, text = ""):
-        "Indent a piece of text, according to the current indentation level"
-        self.f.write("\n"+"    "*self._indent + text)
-
-    def write(self, text):
-        "Append a piece of text to the current line."
-        self.f.write(text)
-
-    def enter(self):
-        "Print ':', and increase the indentation."
-        self.write(":")
-        self._indent += 1
-
-    def leave(self):
-        "Decrease the indentation level."
-        self._indent -= 1
-
-    def dispatch(self, tree):
-        "Dispatcher function, dispatching tree type T to method _T."
-        if isinstance(tree, list):
-            for t in tree:
-                self.dispatch(t)
-            return
-        meth = getattr(self, "_"+tree.__class__.__name__)
-        meth(tree)
-
-
-    ############### Unparsing methods ######################
-    # There should be one method per concrete grammar type #
-    # Constructors should be grouped by sum type. Ideally, #
-    # this would follow the order in the grammar, but      #
-    # currently doesn't.                                   #
-    ########################################################
-
-    def _Module(self, tree):
-        for stmt in tree.body:
-            self.dispatch(stmt)
-
-    # stmt
-    def _Expr(self, tree):
-        self.fill()
-        self.dispatch(tree.value)
-
-    def _Import(self, t):
-        self.fill("import ")
-        first = True
-        for a in t.names:
-            if first:
-                first = False
-            else:
-                self.write(", ")
-            self.write(a.name)
-            if a.asname:
-                self.write(" as "+a.asname)
-
-    def _Assign(self, t):
-        self.fill()
-        for target in t.targets:
-            self.dispatch(target)
-            self.write(" = ")
-        self.dispatch(t.value)
-
-    def _ClassDef(self, t):
-        self.write("\n")
-        self.fill("class "+t.name)
-        if t.bases:
-            self.write("(")
-            for a in t.bases:
-                self.dispatch(a)
-                self.write(", ")
-            self.write(")")
-        self.enter()
-        self.dispatch(t.body)
-        self.leave()
-
-    def _FunctionDef(self, t):
-        self.write("\n")
-        self.fill("def "+t.name + "(")
-        self.dispatch(t.args)
-        self.enter()
-        self.dispatch(t.body)
-        self.leave()
-
-    def _If(self, t):
-        self.fill("if ")
-        self.dispatch(t.test)
-        self.enter()
-        # XXX elif?
-        self.dispatch(t.body)
-        self.leave()
-        if t.orelse:
-            self.fill("else")
-            self.enter()
-            self.dispatch(t.orelse)
-            self.leave()
-
-    # expr
-    def _Str(self, tree):
-        self.write(repr(tree.s))
-
-    def _Name(self, t):
-        self.write(t.id)
-
-    def _List(self, t):
-        self.write("[")
-        for e in t.elts:
-            self.dispatch(e)
-            self.write(", ")
-        self.write("]")
-
-    unop = {"Invert":"~", "Not": "not", "UAdd":"+", "USub":"-"}
-    def _UnaryOp(self, t):
-        self.write(self.unop[t.op.__class__.__name__])
-        self.write("(")
-        self.dispatch(t.operand)
-        self.write(")")
-
-    # others
-    def _arguments(self, t):
-        first = True
-        # XXX t.defaults
-        for a in t.args:
-            if first:first = False
-            else: self.write(", ")
-            self.dispatch(a)
-        if t.vararg:
-            if first:first = False
-            else: self.write(", ")
-            self.write("*"+t.vararg)
-        if t.kwarg:
-            if first:first = False
-            else: self.write(", ")
-            self.write("**"+self.kwarg)
-        self.write(")")
-
-def roundtrip(filename):
-    source = open(filename).read()
-    tree = compile(source, filename, "exec", 0x400)
-    Unparser(tree)
-
-if __name__=='__main__':
-    roundtrip(sys.argv[1])
+"Usage: unparse.py <path to source file>"
+import sys
+
+class Unparser:
+    """Methods in this class recursively traverse an AST and
+    output source code for the abstract syntax; original formatting
+    is disregarged. """
+
+    def __init__(self, tree, file = sys.stdout):
+        """Unparser(tree, file=sys.stdout) -> None.
+         Print the source for tree to file."""
+        self.f = file
+        self._indent = 0
+        self.dispatch(tree)
+        self.f.flush()
+
+    def fill(self, text = ""):
+        "Indent a piece of text, according to the current indentation level"
+        self.f.write("\n"+"    "*self._indent + text)
+
+    def write(self, text):
+        "Append a piece of text to the current line."
+        self.f.write(text)
+
+    def enter(self):
+        "Print ':', and increase the indentation."
+        self.write(":")
+        self._indent += 1
+
+    def leave(self):
+        "Decrease the indentation level."
+        self._indent -= 1
+
+    def dispatch(self, tree):
+        "Dispatcher function, dispatching tree type T to method _T."
+        if isinstance(tree, list):
+            for t in tree:
+                self.dispatch(t)
+            return
+        meth = getattr(self, "_"+tree.__class__.__name__)
+        meth(tree)
+
+
+    ############### Unparsing methods ######################
+    # There should be one method per concrete grammar type #
+    # Constructors should be grouped by sum type. Ideally, #
+    # this would follow the order in the grammar, but      #
+    # currently doesn't.                                   #
+    ########################################################
+
+    def _Module(self, tree):
+        for stmt in tree.body:
+            self.dispatch(stmt)
+
+    # stmt
+    def _Expr(self, tree):
+        self.fill()
+        self.dispatch(tree.value)
+
+    def _Import(self, t):
+        self.fill("import ")
+        first = True
+        for a in t.names:
+            if first:
+                first = False
+            else:
+                self.write(", ")
+            self.write(a.name)
+            if a.asname:
+                self.write(" as "+a.asname)
+
+    def _Assign(self, t):
+        self.fill()
+        for target in t.targets:
+            self.dispatch(target)
+            self.write(" = ")
+        self.dispatch(t.value)
+
+    def _ClassDef(self, t):
+        self.write("\n")
+        self.fill("class "+t.name)
+        if t.bases:
+            self.write("(")
+            for a in t.bases:
+                self.dispatch(a)
+                self.write(", ")
+            self.write(")")
+        self.enter()
+        self.dispatch(t.body)
+        self.leave()
+
+    def _FunctionDef(self, t):
+        self.write("\n")
+        self.fill("def "+t.name + "(")
+        self.dispatch(t.args)
+        self.enter()
+        self.dispatch(t.body)
+        self.leave()
+
+    def _If(self, t):
+        self.fill("if ")
+        self.dispatch(t.test)
+        self.enter()
+        # XXX elif?
+        self.dispatch(t.body)
+        self.leave()
+        if t.orelse:
+            self.fill("else")
+            self.enter()
+            self.dispatch(t.orelse)
+            self.leave()
+
+    # expr
+    def _Str(self, tree):
+        self.write(repr(tree.s))
+
+    def _Name(self, t):
+        self.write(t.id)
+
+    def _List(self, t):
+        self.write("[")
+        for e in t.elts:
+            self.dispatch(e)
+            self.write(", ")
+        self.write("]")
+
+    unop = {"Invert":"~", "Not": "not", "UAdd":"+", "USub":"-"}
+    def _UnaryOp(self, t):
+        self.write(self.unop[t.op.__class__.__name__])
+        self.write("(")
+        self.dispatch(t.operand)
+        self.write(")")
+
+    # others
+    def _arguments(self, t):
+        first = True
+        # XXX t.defaults
+        for a in t.args:
+            if first:first = False
+            else: self.write(", ")
+            self.dispatch(a)
+        if t.vararg:
+            if first:first = False
+            else: self.write(", ")
+            self.write("*"+t.vararg)
+        if t.kwarg:
+            if first:first = False
+            else: self.write(", ")
+            self.write("**"+self.kwarg)
+        self.write(")")
+
+def roundtrip(filename):
+    source = open(filename).read()
+    tree = compile(source, filename, "exec", 0x400)
+    Unparser(tree)
+
+if __name__=='__main__':
+    roundtrip(sys.argv[1])
diff --git a/Lib/test/contextmanager.py b/Lib/test/contextmanager.py
index e8b0894..07fe61c 100644
--- a/Lib/test/contextmanager.py
+++ b/Lib/test/contextmanager.py
@@ -1,33 +1,33 @@
-class GeneratorContextManager(object):
-    def __init__(self, gen):
-        self.gen = gen
-
-    def __context__(self):
-        return self
-
-    def __enter__(self):
-        try:
-            return self.gen.next()
-        except StopIteration:
-            raise RuntimeError("generator didn't yield")
-
-    def __exit__(self, type, value, traceback):
-        if type is None:
-            try:
-                self.gen.next()
-            except StopIteration:
-                return
-            else:
-                raise RuntimeError("generator didn't stop")
-        else:
-            try:
-                self.gen.throw(type, value, traceback)
-            except (type, StopIteration):
-                return
-            else:
-                raise RuntimeError("generator caught exception")
-
-def contextmanager(func):
-    def helper(*args, **kwds):
-        return GeneratorContextManager(func(*args, **kwds))
-    return helper
+class GeneratorContextManager(object):
+    def __init__(self, gen):
+        self.gen = gen
+
+    def __context__(self):
+        return self
+
+    def __enter__(self):
+        try:
+            return self.gen.next()
+        except StopIteration:
+            raise RuntimeError("generator didn't yield")
+
+    def __exit__(self, type, value, traceback):
+        if type is None:
+            try:
+                self.gen.next()
+            except StopIteration:
+                return
+            else:
+                raise RuntimeError("generator didn't stop")
+        else:
+            try:
+                self.gen.throw(type, value, traceback)
+            except (type, StopIteration):
+                return
+            else:
+                raise RuntimeError("generator caught exception")
+
+def contextmanager(func):
+    def helper(*args, **kwds):
+        return GeneratorContextManager(func(*args, **kwds))
+    return helper
diff --git a/Lib/test/nested.py b/Lib/test/nested.py
index a20cf43..b5030e0 100644
--- a/Lib/test/nested.py
+++ b/Lib/test/nested.py
@@ -1,40 +1,40 @@
-import sys
-from collections import deque
-
-
-class nested(object):
-    def __init__(self, *contexts):
-        self.contexts = contexts
-        self.entered = None
-
-    def __context__(self):
-        return self
-
-    def __enter__(self):
-        if self.entered is not None:
-            raise RuntimeError("Context is not reentrant")
-        self.entered = deque()
-        vars = []
-        try:
-            for context in self.contexts:
-                mgr = context.__context__()
-                vars.append(mgr.__enter__())
-                self.entered.appendleft(mgr)
-        except:
-            self.__exit__(*sys.exc_info())
-            raise
-        return vars
-
-    def __exit__(self, *exc_info):
-        # Behave like nested with statements
-        # first in, last out
-        # New exceptions override old ones
-        ex = exc_info
-        for mgr in self.entered:
-            try:
-                mgr.__exit__(*ex)
-            except:
-                ex = sys.exc_info()
-        self.entered = None
-        if ex is not exc_info:
-            raise ex[0], ex[1], ex[2]
+import sys
+from collections import deque
+
+
+class nested(object):
+    def __init__(self, *contexts):
+        self.contexts = contexts
+        self.entered = None
+
+    def __context__(self):
+        return self
+
+    def __enter__(self):
+        if self.entered is not None:
+            raise RuntimeError("Context is not reentrant")
+        self.entered = deque()
+        vars = []
+        try:
+            for context in self.contexts:
+                mgr = context.__context__()
+                vars.append(mgr.__enter__())
+                self.entered.appendleft(mgr)
+        except:
+            self.__exit__(*sys.exc_info())
+            raise
+        return vars
+
+    def __exit__(self, *exc_info):
+        # Behave like nested with statements
+        # first in, last out
+        # New exceptions override old ones
+        ex = exc_info
+        for mgr in self.entered:
+            try:
+                mgr.__exit__(*ex)
+            except:
+                ex = sys.exc_info()
+        self.entered = None
+        if ex is not exc_info:
+            raise ex[0], ex[1], ex[2]
diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index f83dc92..82bb140 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -1,178 +1,178 @@
-import sys, itertools
-
-def to_tuple(t):
-    if t is None or isinstance(t, (basestring, int, long, complex)):
-        return t
-    elif isinstance(t, list):
-        return [to_tuple(e) for e in t]
-    result = [t.__class__.__name__]
-    if t._fields is None:
-        return tuple(result)
-    for f in t._fields:
-        result.append(to_tuple(getattr(t, f)))
-    return tuple(result)
-
-# These tests are compiled through "exec"
-# There should be atleast one test per statement
-exec_tests = [
-    # FunctionDef
-    "def f(): pass",
-    # ClassDef
-    "class C:pass",
-    # Return
-    "def f():return 1",
-    # Delete
-    "del v",
-    # Assign
-    "v = 1",
-    # AugAssign
-    "v += 1",
-    # Print
-    "print >>f, 1, ",
-    # For
-    "for v in v:pass",
-    # While
-    "while v:pass",
-    # If
-    "if v:pass",
-    # Raise
-    "raise Exception, 'string'",
-    # TryExcept
-    "try:\n  pass\nexcept Exception:\n  pass",
-    # TryFinally
-    "try:\n  pass\nfinally:\n  pass",
-    # Assert
-    "assert v",
-    # Import
-    "import sys",
-    # ImportFrom
-    "from sys import v",
-    # Exec
-    "exec 'v'",
-    # Global
-    "global v",
-    # Expr
-    "1",
-    # Pass,
-    "pass",
-    # Break
-    "break",
-    # Continue
-    "continue",
-]
-
-# These are compiled through "single"
-# because of overlap with "eval", it just tests what
-# can't be tested with "eval"
-single_tests = [
-    "1+2"
-]
-
-# These are compiled through "eval"
-# It should test all expressions
-eval_tests = [
-  # BoolOp
-  "a and b",
-  # BinOp
-  "a + b",
-  # UnaryOp
-  "not v",
-  # Lambda
-  "lambda:None",
-  # Dict
-  "{ 1:2 }",
-  # ListComp
-  "[a for b in c if d]",
-  # GeneratorExp
-  "(a for b in c if d)",
-  # Yield - yield expressions can't work outside a function
-  #
-  # Compare
-  "1 < 2 < 3",
-  # Call
-  "f(1,2,c=3,*d,**e)",
-  # Repr
-  "`v`",
-  # Num
-  "10L",
-  # Str
-  "'string'",
-  # Attribute
-  "a.b",
-  # Subscript
-  "a[b:c]",
-  # Name
-  "v",
-  # List
-  "[1,2,3]",
-  # Tuple
-  "1,2,3"
-]
-
-# TODO: expr_context, slice, boolop, operator, unaryop, cmpop, comprehension
-# excepthandler, arguments, keywords, alias
-
-if __name__=='__main__' and sys.argv[1:] == ['-g']:
-    for statements, kind in ((exec_tests, "exec"), (single_tests, "single"), (eval_tests, "eval")):
-        print kind+"_results = ["
-        for s in statements:
-            print repr(to_tuple(compile(s, "?", kind, 0x400)))+","
-        print "]"
-    print "run_tests()"
-    raise SystemExit
-
-def run_tests():
-    for input, output, kind in ((exec_tests, exec_results, "exec"),
-                                        (single_tests, single_results, "single"),
-                                        (eval_tests, eval_results, "eval")):
-        for i, o in itertools.izip(input, output):
-            assert to_tuple(compile(i, "?", kind, 0x400)) == o
-
-#### EVERYTHING BELOW IS GENERATED #####
-exec_results = [
-('Module', [('FunctionDef', 'f', ('arguments', [], None, None, []), [('Pass',)], [])]),
-('Module', [('ClassDef', 'C', [], [('Pass',)])]),
-('Module', [('FunctionDef', 'f', ('arguments', [], None, None, []), [('Return', ('Num', 1))], [])]),
-('Module', [('Delete', [('Name', 'v', ('Del',))])]),
-('Module', [('Assign', [('Name', 'v', ('Store',))], ('Num', 1))]),
-('Module', [('AugAssign', ('Name', 'v', ('Load',)), ('Add',), ('Num', 1))]),
-('Module', [('Print', ('Name', 'f', ('Load',)), [('Num', 1)], False)]),
-('Module', [('For', ('Name', 'v', ('Store',)), ('Name', 'v', ('Load',)), [('Pass',)], [])]),
-('Module', [('While', ('Name', 'v', ('Load',)), [('Pass',)], [])]),
-('Module', [('If', ('Name', 'v', ('Load',)), [('Pass',)], [])]),
-('Module', [('Raise', ('Name', 'Exception', ('Load',)), ('Str', 'string'), None)]),
-('Module', [('TryExcept', [('Pass',)], [('excepthandler', ('Name', 'Exception', ('Load',)), None, [('Pass',)])], [])]),
-('Module', [('TryFinally', [('Pass',)], [('Pass',)])]),
-('Module', [('Assert', ('Name', 'v', ('Load',)), None)]),
-('Module', [('Import', [('alias', 'sys', None)])]),
-('Module', [('ImportFrom', 'sys', [('alias', 'v', None)], 0)]),
-('Module', [('Exec', ('Str', 'v'), None, None)]),
-('Module', [('Global', ['v'])]),
-('Module', [('Expr', ('Num', 1))]),
-('Module', [('Pass',)]),
-('Module', [('Break',)]),
-('Module', [('Continue',)]),
-]
-single_results = [
-('Interactive', [('Expr', ('BinOp', ('Num', 1), ('Add',), ('Num', 2)))]),
-]
-eval_results = [
-('Expression', ('BoolOp', ('And',), [('Name', 'a', ('Load',)), ('Name', 'b', ('Load',))])),
-('Expression', ('BinOp', ('Name', 'a', ('Load',)), ('Add',), ('Name', 'b', ('Load',)))),
-('Expression', ('UnaryOp', ('Not',), ('Name', 'v', ('Load',)))),
-('Expression', ('Lambda', ('arguments', [], None, None, []), ('Name', 'None', ('Load',)))),
-('Expression', ('Dict', [('Num', 1)], [('Num', 2)])),
-('Expression', ('ListComp', ('Name', 'a', ('Load',)), [('comprehension', ('Name', 'b', ('Store',)), ('Name', 'c', ('Load',)), [('Name', 'd', ('Load',))])])),
-('Expression', ('GeneratorExp', ('Name', 'a', ('Load',)), [('comprehension', ('Name', 'b', ('Store',)), ('Name', 'c', ('Load',)), [('Name', 'd', ('Load',))])])),
-('Expression', ('Compare', ('Num', 1), [('Lt',), ('Lt',)], [('Num', 2), ('Num', 3)])),
-('Expression', ('Call', ('Name', 'f', ('Load',)), [('Num', 1), ('Num', 2)], [('keyword', 'c', ('Num', 3))], ('Name', 'd', ('Load',)), ('Name', 'e', ('Load',)))),
-('Expression', ('Repr', ('Name', 'v', ('Load',)))),
-('Expression', ('Num', 10L)),
-('Expression', ('Str', 'string')),
-('Expression', ('Attribute', ('Name', 'a', ('Load',)), 'b', ('Load',))),
-('Expression', ('Subscript', ('Name', 'a', ('Load',)), ('Slice', ('Name', 'b', ('Load',)), ('Name', 'c', ('Load',)), None), ('Load',))),
-('Expression', ('Name', 'v', ('Load',))),
-('Expression', ('List', [('Num', 1), ('Num', 2), ('Num', 3)], ('Load',))),
-('Expression', ('Tuple', [('Num', 1), ('Num', 2), ('Num', 3)], ('Load',))),
-]
-run_tests()
+import sys, itertools
+
+def to_tuple(t):
+    if t is None or isinstance(t, (basestring, int, long, complex)):
+        return t
+    elif isinstance(t, list):
+        return [to_tuple(e) for e in t]
+    result = [t.__class__.__name__]
+    if t._fields is None:
+        return tuple(result)
+    for f in t._fields:
+        result.append(to_tuple(getattr(t, f)))
+    return tuple(result)
+
+# These tests are compiled through "exec"
+# There should be atleast one test per statement
+exec_tests = [
+    # FunctionDef
+    "def f(): pass",
+    # ClassDef
+    "class C:pass",
+    # Return
+    "def f():return 1",
+    # Delete
+    "del v",
+    # Assign
+    "v = 1",
+    # AugAssign
+    "v += 1",
+    # Print
+    "print >>f, 1, ",
+    # For
+    "for v in v:pass",
+    # While
+    "while v:pass",
+    # If
+    "if v:pass",
+    # Raise
+    "raise Exception, 'string'",
+    # TryExcept
+    "try:\n  pass\nexcept Exception:\n  pass",
+    # TryFinally
+    "try:\n  pass\nfinally:\n  pass",
+    # Assert
+    "assert v",
+    # Import
+    "import sys",
+    # ImportFrom
+    "from sys import v",
+    # Exec
+    "exec 'v'",
+    # Global
+    "global v",
+    # Expr
+    "1",
+    # Pass,
+    "pass",
+    # Break
+    "break",
+    # Continue
+    "continue",
+]
+
+# These are compiled through "single"
+# because of overlap with "eval", it just tests what
+# can't be tested with "eval"
+single_tests = [
+    "1+2"
+]
+
+# These are compiled through "eval"
+# It should test all expressions
+eval_tests = [
+  # BoolOp
+  "a and b",
+  # BinOp
+  "a + b",
+  # UnaryOp
+  "not v",
+  # Lambda
+  "lambda:None",
+  # Dict
+  "{ 1:2 }",
+  # ListComp
+  "[a for b in c if d]",
+  # GeneratorExp
+  "(a for b in c if d)",
+  # Yield - yield expressions can't work outside a function
+  #
+  # Compare
+  "1 < 2 < 3",
+  # Call
+  "f(1,2,c=3,*d,**e)",
+  # Repr
+  "`v`",
+  # Num
+  "10L",
+  # Str
+  "'string'",
+  # Attribute
+  "a.b",
+  # Subscript
+  "a[b:c]",
+  # Name
+  "v",
+  # List
+  "[1,2,3]",
+  # Tuple
+  "1,2,3"
+]
+
+# TODO: expr_context, slice, boolop, operator, unaryop, cmpop, comprehension
+# excepthandler, arguments, keywords, alias
+
+if __name__=='__main__' and sys.argv[1:] == ['-g']:
+    for statements, kind in ((exec_tests, "exec"), (single_tests, "single"), (eval_tests, "eval")):
+        print kind+"_results = ["
+        for s in statements:
+            print repr(to_tuple(compile(s, "?", kind, 0x400)))+","
+        print "]"
+    print "run_tests()"
+    raise SystemExit
+
+def run_tests():
+    for input, output, kind in ((exec_tests, exec_results, "exec"),
+                                        (single_tests, single_results, "single"),
+                                        (eval_tests, eval_results, "eval")):
+        for i, o in itertools.izip(input, output):
+            assert to_tuple(compile(i, "?", kind, 0x400)) == o
+
+#### EVERYTHING BELOW IS GENERATED #####
+exec_results = [
+('Module', [('FunctionDef', 'f', ('arguments', [], None, None, []), [('Pass',)], [])]),
+('Module', [('ClassDef', 'C', [], [('Pass',)])]),
+('Module', [('FunctionDef', 'f', ('arguments', [], None, None, []), [('Return', ('Num', 1))], [])]),
+('Module', [('Delete', [('Name', 'v', ('Del',))])]),
+('Module', [('Assign', [('Name', 'v', ('Store',))], ('Num', 1))]),
+('Module', [('AugAssign', ('Name', 'v', ('Load',)), ('Add',), ('Num', 1))]),
+('Module', [('Print', ('Name', 'f', ('Load',)), [('Num', 1)], False)]),
+('Module', [('For', ('Name', 'v', ('Store',)), ('Name', 'v', ('Load',)), [('Pass',)], [])]),
+('Module', [('While', ('Name', 'v', ('Load',)), [('Pass',)], [])]),
+('Module', [('If', ('Name', 'v', ('Load',)), [('Pass',)], [])]),
+('Module', [('Raise', ('Name', 'Exception', ('Load',)), ('Str', 'string'), None)]),
+('Module', [('TryExcept', [('Pass',)], [('excepthandler', ('Name', 'Exception', ('Load',)), None, [('Pass',)])], [])]),
+('Module', [('TryFinally', [('Pass',)], [('Pass',)])]),
+('Module', [('Assert', ('Name', 'v', ('Load',)), None)]),
+('Module', [('Import', [('alias', 'sys', None)])]),
+('Module', [('ImportFrom', 'sys', [('alias', 'v', None)], 0)]),
+('Module', [('Exec', ('Str', 'v'), None, None)]),
+('Module', [('Global', ['v'])]),
+('Module', [('Expr', ('Num', 1))]),
+('Module', [('Pass',)]),
+('Module', [('Break',)]),
+('Module', [('Continue',)]),
+]
+single_results = [
+('Interactive', [('Expr', ('BinOp', ('Num', 1), ('Add',), ('Num', 2)))]),
+]
+eval_results = [
+('Expression', ('BoolOp', ('And',), [('Name', 'a', ('Load',)), ('Name', 'b', ('Load',))])),
+('Expression', ('BinOp', ('Name', 'a', ('Load',)), ('Add',), ('Name', 'b', ('Load',)))),
+('Expression', ('UnaryOp', ('Not',), ('Name', 'v', ('Load',)))),
+('Expression', ('Lambda', ('arguments', [], None, None, []), ('Name', 'None', ('Load',)))),
+('Expression', ('Dict', [('Num', 1)], [('Num', 2)])),
+('Expression', ('ListComp', ('Name', 'a', ('Load',)), [('comprehension', ('Name', 'b', ('Store',)), ('Name', 'c', ('Load',)), [('Name', 'd', ('Load',))])])),
+('Expression', ('GeneratorExp', ('Name', 'a', ('Load',)), [('comprehension', ('Name', 'b', ('Store',)), ('Name', 'c', ('Load',)), [('Name', 'd', ('Load',))])])),
+('Expression', ('Compare', ('Num', 1), [('Lt',), ('Lt',)], [('Num', 2), ('Num', 3)])),
+('Expression', ('Call', ('Name', 'f', ('Load',)), [('Num', 1), ('Num', 2)], [('keyword', 'c', ('Num', 3))], ('Name', 'd', ('Load',)), ('Name', 'e', ('Load',)))),
+('Expression', ('Repr', ('Name', 'v', ('Load',)))),
+('Expression', ('Num', 10L)),
+('Expression', ('Str', 'string')),
+('Expression', ('Attribute', ('Name', 'a', ('Load',)), 'b', ('Load',))),
+('Expression', ('Subscript', ('Name', 'a', ('Load',)), ('Slice', ('Name', 'b', ('Load',)), ('Name', 'c', ('Load',)), None), ('Load',))),
+('Expression', ('Name', 'v', ('Load',))),
+('Expression', ('List', [('Num', 1), ('Num', 2), ('Num', 3)], ('Load',))),
+('Expression', ('Tuple', [('Num', 1), ('Num', 2), ('Num', 3)], ('Load',))),
+]
+run_tests()
diff --git a/Lib/test/test_with.py b/Lib/test/test_with.py
index 3f32830..8423ee1 100644
--- a/Lib/test/test_with.py
+++ b/Lib/test/test_with.py
@@ -1,560 +1,560 @@
-#!/usr/bin/env python
-
-"""Unit tests for the with statement specified in PEP 343."""
-
-__author__ = "Mike Bland"
-__email__ = "mbland at acm dot org"
-
-import unittest
-from test.contextmanager import GeneratorContextManager
-from test.nested import nested
-from test.test_support import run_unittest
-
-
-class MockContextManager(GeneratorContextManager):
-    def __init__(self, gen):
-        GeneratorContextManager.__init__(self, gen)
-        self.context_called = False
-        self.enter_called = False
-        self.exit_called = False
-        self.exit_args = None
-
-    def __context__(self):
-        self.context_called = True
-        return GeneratorContextManager.__context__(self)
-
-    def __enter__(self):
-        self.enter_called = True
-        return GeneratorContextManager.__enter__(self)
-
-    def __exit__(self, type, value, traceback):
-        self.exit_called = True
-        self.exit_args = (type, value, traceback)
-        return GeneratorContextManager.__exit__(self, type, value, traceback)
-
-
-def mock_contextmanager(func):
-    def helper(*args, **kwds):
-        return MockContextManager(func(*args, **kwds))
-    return helper
-
-
-class MockResource(object):
-    def __init__(self):
-        self.yielded = False
-        self.stopped = False
-
-
-@mock_contextmanager
-def mock_contextmanager_generator():
-    mock = MockResource()
-    try:
-        mock.yielded = True
-        yield mock
-    finally:
-        mock.stopped = True
-
-
-class MockNested(nested):
-    def __init__(self, *contexts):
-        nested.__init__(self, *contexts)
-        self.context_called = False
-        self.enter_called = False
-        self.exit_called = False
-        self.exit_args = None
-
-    def __context__(self):
-        self.context_called = True
-        return nested.__context__(self)
-
-    def __enter__(self):
-        self.enter_called = True
-        return nested.__enter__(self)
-
-    def __exit__(self, *exc_info):
-        self.exit_called = True
-        self.exit_args = exc_info
-        return nested.__exit__(self, *exc_info)
-
-
-class FailureTestCase(unittest.TestCase):
-    def testNameError(self):
-        def fooNotDeclared():
-            with foo: pass
-        self.assertRaises(NameError, fooNotDeclared)
-
-    def testContextAttributeError(self):
-        class LacksContext(object):
-            def __enter__(self):
-                pass
-
-            def __exit__(self, type, value, traceback):
-                pass
-
-        def fooLacksContext():
-            foo = LacksContext()
-            with foo: pass
-        self.assertRaises(AttributeError, fooLacksContext)
-
-    def testEnterAttributeError(self):
-        class LacksEnter(object):
-            def __context__(self):
-                pass
-
-            def __exit__(self, type, value, traceback):
-                pass
-
-        def fooLacksEnter():
-            foo = LacksEnter()
-            with foo: pass
-        self.assertRaises(AttributeError, fooLacksEnter)
-
-    def testExitAttributeError(self):
-        class LacksExit(object):
-            def __context__(self):
-                pass
-
-            def __enter__(self):
-                pass
-
-        def fooLacksExit():
-            foo = LacksExit()
-            with foo: pass
-        self.assertRaises(AttributeError, fooLacksExit)
-
-    def assertRaisesSyntaxError(self, codestr):
-        def shouldRaiseSyntaxError(s):
-            compile(s, '', 'single')
-        self.assertRaises(SyntaxError, shouldRaiseSyntaxError, codestr)
-
-    def testAssignmentToNoneError(self):
-        self.assertRaisesSyntaxError('with mock as None:\n  pass')
-        self.assertRaisesSyntaxError(
-            'with mock as (None):\n'
-            '  pass')
-
-    def testAssignmentToEmptyTupleError(self):
-        self.assertRaisesSyntaxError(
-            'with mock as ():\n'
-            '  pass')
-
-    def testAssignmentToTupleOnlyContainingNoneError(self):
-        self.assertRaisesSyntaxError('with mock as None,:\n  pass')
-        self.assertRaisesSyntaxError(
-            'with mock as (None,):\n'
-            '  pass')
-
-    def testAssignmentToTupleContainingNoneError(self):
-        self.assertRaisesSyntaxError(
-            'with mock as (foo, None, bar):\n'
-            '  pass')
-
-    def testContextThrows(self):
-        class ContextThrows(object):
-            def __context__(self):
-                raise RuntimeError("Context threw")
-
-        def shouldThrow():
-            ct = ContextThrows()
-            self.foo = None
-            with ct as self.foo:
-                pass
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertEqual(self.foo, None)
-
-    def testEnterThrows(self):
-        class EnterThrows(object):
-            def __context__(self):
-                return self
-
-            def __enter__(self):
-                raise RuntimeError("Context threw")
-
-            def __exit__(self, *args):
-                pass
-
-        def shouldThrow():
-            ct = EnterThrows()
-            self.foo = None
-            with ct as self.foo:
-                pass
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertEqual(self.foo, None)
-
-    def testExitThrows(self):
-        class ExitThrows(object):
-            def __context__(self):
-                return self
-            def __enter__(self):
-                return
-            def __exit__(self, *args):
-                raise RuntimeError(42)
-        def shouldThrow():
-            with ExitThrows():
-                pass
-        self.assertRaises(RuntimeError, shouldThrow)
-
-class ContextmanagerAssertionMixin(object):
-    TEST_EXCEPTION = RuntimeError("test exception")
-
-    def assertInWithManagerInvariants(self, mock_manager):
-        self.assertTrue(mock_manager.context_called)
-        self.assertTrue(mock_manager.enter_called)
-        self.assertFalse(mock_manager.exit_called)
-        self.assertEqual(mock_manager.exit_args, None)
-
-    def assertAfterWithManagerInvariants(self, mock_manager, exit_args):
-        self.assertTrue(mock_manager.context_called)
-        self.assertTrue(mock_manager.enter_called)
-        self.assertTrue(mock_manager.exit_called)
-        self.assertEqual(mock_manager.exit_args, exit_args)
-
-    def assertAfterWithManagerInvariantsNoError(self, mock_manager):
-        self.assertAfterWithManagerInvariants(mock_manager,
-            (None, None, None))
-
-    def assertInWithGeneratorInvariants(self, mock_generator):
-        self.assertTrue(mock_generator.yielded)
-        self.assertFalse(mock_generator.stopped)
-
-    def assertAfterWithGeneratorInvariantsNoError(self, mock_generator):
-        self.assertTrue(mock_generator.yielded)
-        self.assertTrue(mock_generator.stopped)
-
-    def raiseTestException(self):
-        raise self.TEST_EXCEPTION
-
-    def assertAfterWithManagerInvariantsWithError(self, mock_manager):
-        self.assertTrue(mock_manager.context_called)
-        self.assertTrue(mock_manager.enter_called)
-        self.assertTrue(mock_manager.exit_called)
-        self.assertEqual(mock_manager.exit_args[0], RuntimeError)
-        self.assertEqual(mock_manager.exit_args[1], self.TEST_EXCEPTION)
-
-    def assertAfterWithGeneratorInvariantsWithError(self, mock_generator):
-        self.assertTrue(mock_generator.yielded)
-        self.assertTrue(mock_generator.stopped)
-
-
-class NonexceptionalTestCase(unittest.TestCase, ContextmanagerAssertionMixin):
-    def testInlineGeneratorSyntax(self):
-        with mock_contextmanager_generator():
-            pass
-
-    def testUnboundGenerator(self):
-        mock = mock_contextmanager_generator()
-        with mock:
-            pass
-        self.assertAfterWithManagerInvariantsNoError(mock)
-
-    def testInlineGeneratorBoundSyntax(self):
-        with mock_contextmanager_generator() as foo:
-            self.assertInWithGeneratorInvariants(foo)
-        # FIXME: In the future, we'll try to keep the bound names from leaking
-        self.assertAfterWithGeneratorInvariantsNoError(foo)
-
-    def testInlineGeneratorBoundToExistingVariable(self):
-        foo = None
-        with mock_contextmanager_generator() as foo:
-            self.assertInWithGeneratorInvariants(foo)
-        self.assertAfterWithGeneratorInvariantsNoError(foo)
-
-    def testInlineGeneratorBoundToDottedVariable(self):
-        with mock_contextmanager_generator() as self.foo:
-            self.assertInWithGeneratorInvariants(self.foo)
-        self.assertAfterWithGeneratorInvariantsNoError(self.foo)
-
-    def testBoundGenerator(self):
-        mock = mock_contextmanager_generator()
-        with mock as foo:
-            self.assertInWithGeneratorInvariants(foo)
-            self.assertInWithManagerInvariants(mock)
-        self.assertAfterWithGeneratorInvariantsNoError(foo)
-        self.assertAfterWithManagerInvariantsNoError(mock)
-
-    def testNestedSingleStatements(self):
-        mock_a = mock_contextmanager_generator()
-        with mock_a as foo:
-            mock_b = mock_contextmanager_generator()
-            with mock_b as bar:
-                self.assertInWithManagerInvariants(mock_a)
-                self.assertInWithManagerInvariants(mock_b)
-                self.assertInWithGeneratorInvariants(foo)
-                self.assertInWithGeneratorInvariants(bar)
-            self.assertAfterWithManagerInvariantsNoError(mock_b)
-            self.assertAfterWithGeneratorInvariantsNoError(bar)
-            self.assertInWithManagerInvariants(mock_a)
-            self.assertInWithGeneratorInvariants(foo)
-        self.assertAfterWithManagerInvariantsNoError(mock_a)
-        self.assertAfterWithGeneratorInvariantsNoError(foo)
-
-
-class NestedNonexceptionalTestCase(unittest.TestCase,
-    ContextmanagerAssertionMixin):
-    def testSingleArgInlineGeneratorSyntax(self):
-        with nested(mock_contextmanager_generator()):
-            pass
-
-    def testSingleArgUnbound(self):
-        mock_contextmanager = mock_contextmanager_generator()
-        mock_nested = MockNested(mock_contextmanager)
-        with mock_nested:
-            self.assertInWithManagerInvariants(mock_contextmanager)
-            self.assertInWithManagerInvariants(mock_nested)
-        self.assertAfterWithManagerInvariantsNoError(mock_contextmanager)
-        self.assertAfterWithManagerInvariantsNoError(mock_nested)
-
-    def testSingleArgBoundToNonTuple(self):
-        m = mock_contextmanager_generator()
-        # This will bind all the arguments to nested() into a single list
-        # assigned to foo.
-        with nested(m) as foo:
-            self.assertInWithManagerInvariants(m)
-        self.assertAfterWithManagerInvariantsNoError(m)
-
-    def testSingleArgBoundToSingleElementParenthesizedList(self):
-        m = mock_contextmanager_generator()
-        # This will bind all the arguments to nested() into a single list
-        # assigned to foo.
-        # FIXME: what should this do:  with nested(m) as (foo,):
-        with nested(m) as (foo):
-            self.assertInWithManagerInvariants(m)
-        self.assertAfterWithManagerInvariantsNoError(m)
-
-    def testSingleArgBoundToMultipleElementTupleError(self):
-        def shouldThrowValueError():
-            with nested(mock_contextmanager_generator()) as (foo, bar):
-                pass
-        self.assertRaises(ValueError, shouldThrowValueError)
-
-    def testSingleArgUnbound(self):
-        mock_contextmanager = mock_contextmanager_generator()
-        mock_nested = MockNested(mock_contextmanager)
-        with mock_nested:
-            self.assertInWithManagerInvariants(mock_contextmanager)
-            self.assertInWithManagerInvariants(mock_nested)
-        self.assertAfterWithManagerInvariantsNoError(mock_contextmanager)
-        self.assertAfterWithManagerInvariantsNoError(mock_nested)
-
-    def testMultipleArgUnbound(self):
-        m = mock_contextmanager_generator()
-        n = mock_contextmanager_generator()
-        o = mock_contextmanager_generator()
-        mock_nested = MockNested(m, n, o)
-        with mock_nested:
-            self.assertInWithManagerInvariants(m)
-            self.assertInWithManagerInvariants(n)
-            self.assertInWithManagerInvariants(o)
-            self.assertInWithManagerInvariants(mock_nested)
-        self.assertAfterWithManagerInvariantsNoError(m)
-        self.assertAfterWithManagerInvariantsNoError(n)
-        self.assertAfterWithManagerInvariantsNoError(o)
-        self.assertAfterWithManagerInvariantsNoError(mock_nested)
-
-    def testMultipleArgBound(self):
-        mock_nested = MockNested(mock_contextmanager_generator(),
-            mock_contextmanager_generator(), mock_contextmanager_generator())
-        with mock_nested as (m, n, o):
-            self.assertInWithGeneratorInvariants(m)
-            self.assertInWithGeneratorInvariants(n)
-            self.assertInWithGeneratorInvariants(o)
-            self.assertInWithManagerInvariants(mock_nested)
-        self.assertAfterWithGeneratorInvariantsNoError(m)
-        self.assertAfterWithGeneratorInvariantsNoError(n)
-        self.assertAfterWithGeneratorInvariantsNoError(o)
-        self.assertAfterWithManagerInvariantsNoError(mock_nested)
-
-
-class ExceptionalTestCase(unittest.TestCase, ContextmanagerAssertionMixin):
-    def testSingleResource(self):
-        cm = mock_contextmanager_generator()
-        def shouldThrow():
-            with cm as self.resource:
-                self.assertInWithManagerInvariants(cm)
-                self.assertInWithGeneratorInvariants(self.resource)
-                self.raiseTestException()
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertAfterWithManagerInvariantsWithError(cm)
-        self.assertAfterWithGeneratorInvariantsWithError(self.resource)
-
-    def testNestedSingleStatements(self):
-        mock_a = mock_contextmanager_generator()
-        mock_b = mock_contextmanager_generator()
-        def shouldThrow():
-            with mock_a as self.foo:
-                with mock_b as self.bar:
-                    self.assertInWithManagerInvariants(mock_a)
-                    self.assertInWithManagerInvariants(mock_b)
-                    self.assertInWithGeneratorInvariants(self.foo)
-                    self.assertInWithGeneratorInvariants(self.bar)
-                    self.raiseTestException()
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertAfterWithManagerInvariantsWithError(mock_a)
-        self.assertAfterWithManagerInvariantsWithError(mock_b)
-        self.assertAfterWithGeneratorInvariantsWithError(self.foo)
-        self.assertAfterWithGeneratorInvariantsWithError(self.bar)
-
-    def testMultipleResourcesInSingleStatement(self):
-        cm_a = mock_contextmanager_generator()
-        cm_b = mock_contextmanager_generator()
-        mock_nested = MockNested(cm_a, cm_b)
-        def shouldThrow():
-            with mock_nested as (self.resource_a, self.resource_b):
-                self.assertInWithManagerInvariants(cm_a)
-                self.assertInWithManagerInvariants(cm_b)
-                self.assertInWithManagerInvariants(mock_nested)
-                self.assertInWithGeneratorInvariants(self.resource_a)
-                self.assertInWithGeneratorInvariants(self.resource_b)
-                self.raiseTestException()
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertAfterWithManagerInvariantsWithError(cm_a)
-        self.assertAfterWithManagerInvariantsWithError(cm_b)
-        self.assertAfterWithManagerInvariantsWithError(mock_nested)
-        self.assertAfterWithGeneratorInvariantsWithError(self.resource_a)
-        self.assertAfterWithGeneratorInvariantsWithError(self.resource_b)
-
-    def testNestedExceptionBeforeInnerStatement(self):
-        mock_a = mock_contextmanager_generator()
-        mock_b = mock_contextmanager_generator()
-        self.bar = None
-        def shouldThrow():
-            with mock_a as self.foo:
-                self.assertInWithManagerInvariants(mock_a)
-                self.assertInWithGeneratorInvariants(self.foo)
-                self.raiseTestException()
-                with mock_b as self.bar:
-                    pass
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertAfterWithManagerInvariantsWithError(mock_a)
-        self.assertAfterWithGeneratorInvariantsWithError(self.foo)
-
-        # The inner statement stuff should never have been touched
-        self.assertEqual(self.bar, None)
-        self.assertFalse(mock_b.context_called)
-        self.assertFalse(mock_b.enter_called)
-        self.assertFalse(mock_b.exit_called)
-        self.assertEqual(mock_b.exit_args, None)
-
-    def testNestedExceptionAfterInnerStatement(self):
-        mock_a = mock_contextmanager_generator()
-        mock_b = mock_contextmanager_generator()
-        def shouldThrow():
-            with mock_a as self.foo:
-                with mock_b as self.bar:
-                    self.assertInWithManagerInvariants(mock_a)
-                    self.assertInWithManagerInvariants(mock_b)
-                    self.assertInWithGeneratorInvariants(self.foo)
-                    self.assertInWithGeneratorInvariants(self.bar)
-                self.raiseTestException()
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertAfterWithManagerInvariantsWithError(mock_a)
-        self.assertAfterWithManagerInvariantsNoError(mock_b)
-        self.assertAfterWithGeneratorInvariantsWithError(self.foo)
-        self.assertAfterWithGeneratorInvariantsNoError(self.bar)
-
-
-class NonLocalFlowControlTestCase(unittest.TestCase):
-
-    def testWithBreak(self):
-        counter = 0
-        while True:
-            counter += 1
-            with mock_contextmanager_generator():
-                counter += 10
-                break
-            counter += 100 # Not reached
-        self.assertEqual(counter, 11)
-
-    def testWithContinue(self):
-        counter = 0
-        while True:
-            counter += 1
-            if counter > 2:
-                break
-            with mock_contextmanager_generator():
-                counter += 10
-                continue
-            counter += 100 # Not reached
-        self.assertEqual(counter, 12)
-
-    def testWithReturn(self):
-        def foo():
-            counter = 0
-            while True:
-                counter += 1
-                with mock_contextmanager_generator():
-                    counter += 10
-                    return counter
-                counter += 100 # Not reached
-        self.assertEqual(foo(), 11)
-
-    def testWithYield(self):
-        def gen():
-            with mock_contextmanager_generator():
-                yield 12
-                yield 13
-        x = list(gen())
-        self.assertEqual(x, [12, 13])
-
-    def testWithRaise(self):
-        counter = 0
-        try:
-            counter += 1
-            with mock_contextmanager_generator():
-                counter += 10
-                raise RuntimeError
-            counter += 100 # Not reached
-        except RuntimeError:
-            self.assertEqual(counter, 11)
-        else:
-            self.fail("Didn't raise RuntimeError")
-
-
-class AssignmentTargetTestCase(unittest.TestCase):
-
-    def testSingleComplexTarget(self):
-        targets = {1: [0, 1, 2]}
-        with mock_contextmanager_generator() as targets[1][0]:
-            self.assertEqual(targets.keys(), [1])
-            self.assertEqual(targets[1][0].__class__, MockResource)
-        with mock_contextmanager_generator() as targets.values()[0][1]:
-            self.assertEqual(targets.keys(), [1])
-            self.assertEqual(targets[1][1].__class__, MockResource)
-        with mock_contextmanager_generator() as targets[2]:
-            keys = targets.keys()
-            keys.sort()
-            self.assertEqual(keys, [1, 2])
-        class C: pass
-        blah = C()
-        with mock_contextmanager_generator() as blah.foo:
-            self.assertEqual(hasattr(blah, "foo"), True)
-
-    def testMultipleComplexTargets(self):
-        class C:
-            def __context__(self): return self
-            def __enter__(self): return 1, 2, 3
-            def __exit__(self, *a): pass
-        targets = {1: [0, 1, 2]}
-        with C() as (targets[1][0], targets[1][1], targets[1][2]):
-            self.assertEqual(targets, {1: [1, 2, 3]})
-        with C() as (targets.values()[0][2], targets.values()[0][1], targets.values()[0][0]):
-            self.assertEqual(targets, {1: [3, 2, 1]})
-        with C() as (targets[1], targets[2], targets[3]):
-            self.assertEqual(targets, {1: 1, 2: 2, 3: 3})
-        class B: pass
-        blah = B()
-        with C() as (blah.one, blah.two, blah.three):
-            self.assertEqual(blah.one, 1)
-            self.assertEqual(blah.two, 2)
-            self.assertEqual(blah.three, 3)
-
-
-def test_main():
-    run_unittest(FailureTestCase, NonexceptionalTestCase,
-                 NestedNonexceptionalTestCase, ExceptionalTestCase,
-                 NonLocalFlowControlTestCase,
-                 AssignmentTargetTestCase)
-
-
-if __name__ == '__main__':
-    test_main()
+#!/usr/bin/env python
+
+"""Unit tests for the with statement specified in PEP 343."""
+
+__author__ = "Mike Bland"
+__email__ = "mbland at acm dot org"
+
+import unittest
+from test.contextmanager import GeneratorContextManager
+from test.nested import nested
+from test.test_support import run_unittest
+
+
+class MockContextManager(GeneratorContextManager):
+    def __init__(self, gen):
+        GeneratorContextManager.__init__(self, gen)
+        self.context_called = False
+        self.enter_called = False
+        self.exit_called = False
+        self.exit_args = None
+
+    def __context__(self):
+        self.context_called = True
+        return GeneratorContextManager.__context__(self)
+
+    def __enter__(self):
+        self.enter_called = True
+        return GeneratorContextManager.__enter__(self)
+
+    def __exit__(self, type, value, traceback):
+        self.exit_called = True
+        self.exit_args = (type, value, traceback)
+        return GeneratorContextManager.__exit__(self, type, value, traceback)
+
+
+def mock_contextmanager(func):
+    def helper(*args, **kwds):
+        return MockContextManager(func(*args, **kwds))
+    return helper
+
+
+class MockResource(object):
+    def __init__(self):
+        self.yielded = False
+        self.stopped = False
+
+
+@mock_contextmanager
+def mock_contextmanager_generator():
+    mock = MockResource()
+    try:
+        mock.yielded = True
+        yield mock
+    finally:
+        mock.stopped = True
+
+
+class MockNested(nested):
+    def __init__(self, *contexts):
+        nested.__init__(self, *contexts)
+        self.context_called = False
+        self.enter_called = False
+        self.exit_called = False
+        self.exit_args = None
+
+    def __context__(self):
+        self.context_called = True
+        return nested.__context__(self)
+
+    def __enter__(self):
+        self.enter_called = True
+        return nested.__enter__(self)
+
+    def __exit__(self, *exc_info):
+        self.exit_called = True
+        self.exit_args = exc_info
+        return nested.__exit__(self, *exc_info)
+
+
+class FailureTestCase(unittest.TestCase):
+    def testNameError(self):
+        def fooNotDeclared():
+            with foo: pass
+        self.assertRaises(NameError, fooNotDeclared)
+
+    def testContextAttributeError(self):
+        class LacksContext(object):
+            def __enter__(self):
+                pass
+
+            def __exit__(self, type, value, traceback):
+                pass
+
+        def fooLacksContext():
+            foo = LacksContext()
+            with foo: pass
+        self.assertRaises(AttributeError, fooLacksContext)
+
+    def testEnterAttributeError(self):
+        class LacksEnter(object):
+            def __context__(self):
+                pass
+
+            def __exit__(self, type, value, traceback):
+                pass
+
+        def fooLacksEnter():
+            foo = LacksEnter()
+            with foo: pass
+        self.assertRaises(AttributeError, fooLacksEnter)
+
+    def testExitAttributeError(self):
+        class LacksExit(object):
+            def __context__(self):
+                pass
+
+            def __enter__(self):
+                pass
+
+        def fooLacksExit():
+            foo = LacksExit()
+            with foo: pass
+        self.assertRaises(AttributeError, fooLacksExit)
+
+    def assertRaisesSyntaxError(self, codestr):
+        def shouldRaiseSyntaxError(s):
+            compile(s, '', 'single')
+        self.assertRaises(SyntaxError, shouldRaiseSyntaxError, codestr)
+
+    def testAssignmentToNoneError(self):
+        self.assertRaisesSyntaxError('with mock as None:\n  pass')
+        self.assertRaisesSyntaxError(
+            'with mock as (None):\n'
+            '  pass')
+
+    def testAssignmentToEmptyTupleError(self):
+        self.assertRaisesSyntaxError(
+            'with mock as ():\n'
+            '  pass')
+
+    def testAssignmentToTupleOnlyContainingNoneError(self):
+        self.assertRaisesSyntaxError('with mock as None,:\n  pass')
+        self.assertRaisesSyntaxError(
+            'with mock as (None,):\n'
+            '  pass')
+
+    def testAssignmentToTupleContainingNoneError(self):
+        self.assertRaisesSyntaxError(
+            'with mock as (foo, None, bar):\n'
+            '  pass')
+
+    def testContextThrows(self):
+        class ContextThrows(object):
+            def __context__(self):
+                raise RuntimeError("Context threw")
+
+        def shouldThrow():
+            ct = ContextThrows()
+            self.foo = None
+            with ct as self.foo:
+                pass
+        self.assertRaises(RuntimeError, shouldThrow)
+        self.assertEqual(self.foo, None)
+
+    def testEnterThrows(self):
+        class EnterThrows(object):
+            def __context__(self):
+                return self
+
+            def __enter__(self):
+                raise RuntimeError("Context threw")
+
+            def __exit__(self, *args):
+                pass
+
+        def shouldThrow():
+            ct = EnterThrows()
+            self.foo = None
+            with ct as self.foo:
+                pass
+        self.assertRaises(RuntimeError, shouldThrow)
+        self.assertEqual(self.foo, None)
+
+    def testExitThrows(self):
+        class ExitThrows(object):
+            def __context__(self):
+                return self
+            def __enter__(self):
+                return
+            def __exit__(self, *args):
+                raise RuntimeError(42)
+        def shouldThrow():
+            with ExitThrows():
+                pass
+        self.assertRaises(RuntimeError, shouldThrow)
+
+class ContextmanagerAssertionMixin(object):
+    TEST_EXCEPTION = RuntimeError("test exception")
+
+    def assertInWithManagerInvariants(self, mock_manager):
+        self.assertTrue(mock_manager.context_called)
+        self.assertTrue(mock_manager.enter_called)
+        self.assertFalse(mock_manager.exit_called)
+        self.assertEqual(mock_manager.exit_args, None)
+
+    def assertAfterWithManagerInvariants(self, mock_manager, exit_args):
+        self.assertTrue(mock_manager.context_called)
+        self.assertTrue(mock_manager.enter_called)
+        self.assertTrue(mock_manager.exit_called)
+        self.assertEqual(mock_manager.exit_args, exit_args)
+
+    def assertAfterWithManagerInvariantsNoError(self, mock_manager):
+        self.assertAfterWithManagerInvariants(mock_manager,
+            (None, None, None))
+
+    def assertInWithGeneratorInvariants(self, mock_generator):
+        self.assertTrue(mock_generator.yielded)
+        self.assertFalse(mock_generator.stopped)
+
+    def assertAfterWithGeneratorInvariantsNoError(self, mock_generator):
+        self.assertTrue(mock_generator.yielded)
+        self.assertTrue(mock_generator.stopped)
+
+    def raiseTestException(self):
+        raise self.TEST_EXCEPTION
+
+    def assertAfterWithManagerInvariantsWithError(self, mock_manager):
+        self.assertTrue(mock_manager.context_called)
+        self.assertTrue(mock_manager.enter_called)
+        self.assertTrue(mock_manager.exit_called)
+        self.assertEqual(mock_manager.exit_args[0], RuntimeError)
+        self.assertEqual(mock_manager.exit_args[1], self.TEST_EXCEPTION)
+
+    def assertAfterWithGeneratorInvariantsWithError(self, mock_generator):
+        self.assertTrue(mock_generator.yielded)
+        self.assertTrue(mock_generator.stopped)
+
+
+class NonexceptionalTestCase(unittest.TestCase, ContextmanagerAssertionMixin):
+    def testInlineGeneratorSyntax(self):
+        with mock_contextmanager_generator():
+            pass
+
+    def testUnboundGenerator(self):
+        mock = mock_contextmanager_generator()
+        with mock:
+            pass
+        self.assertAfterWithManagerInvariantsNoError(mock)
+
+    def testInlineGeneratorBoundSyntax(self):
+        with mock_contextmanager_generator() as foo:
+            self.assertInWithGeneratorInvariants(foo)
+        # FIXME: In the future, we'll try to keep the bound names from leaking
+        self.assertAfterWithGeneratorInvariantsNoError(foo)
+
+    def testInlineGeneratorBoundToExistingVariable(self):
+        foo = None
+        with mock_contextmanager_generator() as foo:
+            self.assertInWithGeneratorInvariants(foo)
+        self.assertAfterWithGeneratorInvariantsNoError(foo)
+
+    def testInlineGeneratorBoundToDottedVariable(self):
+        with mock_contextmanager_generator() as self.foo:
+            self.assertInWithGeneratorInvariants(self.foo)
+        self.assertAfterWithGeneratorInvariantsNoError(self.foo)
+
+    def testBoundGenerator(self):
+        mock = mock_contextmanager_generator()
+        with mock as foo:
+            self.assertInWithGeneratorInvariants(foo)
+            self.assertInWithManagerInvariants(mock)
+        self.assertAfterWithGeneratorInvariantsNoError(foo)
+        self.assertAfterWithManagerInvariantsNoError(mock)
+
+    def testNestedSingleStatements(self):
+        mock_a = mock_contextmanager_generator()
+        with mock_a as foo:
+            mock_b = mock_contextmanager_generator()
+            with mock_b as bar:
+                self.assertInWithManagerInvariants(mock_a)
+                self.assertInWithManagerInvariants(mock_b)
+                self.assertInWithGeneratorInvariants(foo)
+                self.assertInWithGeneratorInvariants(bar)
+            self.assertAfterWithManagerInvariantsNoError(mock_b)
+            self.assertAfterWithGeneratorInvariantsNoError(bar)
+            self.assertInWithManagerInvariants(mock_a)
+            self.assertInWithGeneratorInvariants(foo)
+        self.assertAfterWithManagerInvariantsNoError(mock_a)
+        self.assertAfterWithGeneratorInvariantsNoError(foo)
+
+
+class NestedNonexceptionalTestCase(unittest.TestCase,
+    ContextmanagerAssertionMixin):
+    def testSingleArgInlineGeneratorSyntax(self):
+        with nested(mock_contextmanager_generator()):
+            pass
+
+    def testSingleArgUnbound(self):
+        mock_contextmanager = mock_contextmanager_generator()
+        mock_nested = MockNested(mock_contextmanager)
+        with mock_nested:
+            self.assertInWithManagerInvariants(mock_contextmanager)
+            self.assertInWithManagerInvariants(mock_nested)
+        self.assertAfterWithManagerInvariantsNoError(mock_contextmanager)
+        self.assertAfterWithManagerInvariantsNoError(mock_nested)
+
+    def testSingleArgBoundToNonTuple(self):
+        m = mock_contextmanager_generator()
+        # This will bind all the arguments to nested() into a single list
+        # assigned to foo.
+        with nested(m) as foo:
+            self.assertInWithManagerInvariants(m)
+        self.assertAfterWithManagerInvariantsNoError(m)
+
+    def testSingleArgBoundToSingleElementParenthesizedList(self):
+        m = mock_contextmanager_generator()
+        # This will bind all the arguments to nested() into a single list
+        # assigned to foo.
+        # FIXME: what should this do:  with nested(m) as (foo,):
+        with nested(m) as (foo):
+            self.assertInWithManagerInvariants(m)
+        self.assertAfterWithManagerInvariantsNoError(m)
+
+    def testSingleArgBoundToMultipleElementTupleError(self):
+        def shouldThrowValueError():
+            with nested(mock_contextmanager_generator()) as (foo, bar):
+                pass
+        self.assertRaises(ValueError, shouldThrowValueError)
+
+    def testSingleArgUnbound(self):
+        mock_contextmanager = mock_contextmanager_generator()
+        mock_nested = MockNested(mock_contextmanager)
+        with mock_nested:
+            self.assertInWithManagerInvariants(mock_contextmanager)
+            self.assertInWithManagerInvariants(mock_nested)
+        self.assertAfterWithManagerInvariantsNoError(mock_contextmanager)
+        self.assertAfterWithManagerInvariantsNoError(mock_nested)
+
+    def testMultipleArgUnbound(self):
+        m = mock_contextmanager_generator()
+        n = mock_contextmanager_generator()
+        o = mock_contextmanager_generator()
+        mock_nested = MockNested(m, n, o)
+        with mock_nested:
+            self.assertInWithManagerInvariants(m)
+            self.assertInWithManagerInvariants(n)
+            self.assertInWithManagerInvariants(o)
+            self.assertInWithManagerInvariants(mock_nested)
+        self.assertAfterWithManagerInvariantsNoError(m)
+        self.assertAfterWithManagerInvariantsNoError(n)
+        self.assertAfterWithManagerInvariantsNoError(o)
+        self.assertAfterWithManagerInvariantsNoError(mock_nested)
+
+    def testMultipleArgBound(self):
+        mock_nested = MockNested(mock_contextmanager_generator(),
+            mock_contextmanager_generator(), mock_contextmanager_generator())
+        with mock_nested as (m, n, o):
+            self.assertInWithGeneratorInvariants(m)
+            self.assertInWithGeneratorInvariants(n)
+            self.assertInWithGeneratorInvariants(o)
+            self.assertInWithManagerInvariants(mock_nested)
+        self.assertAfterWithGeneratorInvariantsNoError(m)
+        self.assertAfterWithGeneratorInvariantsNoError(n)
+        self.assertAfterWithGeneratorInvariantsNoError(o)
+        self.assertAfterWithManagerInvariantsNoError(mock_nested)
+
+
+class ExceptionalTestCase(unittest.TestCase, ContextmanagerAssertionMixin):
+    def testSingleResource(self):
+        cm = mock_contextmanager_generator()
+        def shouldThrow():
+            with cm as self.resource:
+                self.assertInWithManagerInvariants(cm)
+                self.assertInWithGeneratorInvariants(self.resource)
+                self.raiseTestException()
+        self.assertRaises(RuntimeError, shouldThrow)
+        self.assertAfterWithManagerInvariantsWithError(cm)
+        self.assertAfterWithGeneratorInvariantsWithError(self.resource)
+
+    def testNestedSingleStatements(self):
+        mock_a = mock_contextmanager_generator()
+        mock_b = mock_contextmanager_generator()
+        def shouldThrow():
+            with mock_a as self.foo:
+                with mock_b as self.bar:
+                    self.assertInWithManagerInvariants(mock_a)
+                    self.assertInWithManagerInvariants(mock_b)
+                    self.assertInWithGeneratorInvariants(self.foo)
+                    self.assertInWithGeneratorInvariants(self.bar)
+                    self.raiseTestException()
+        self.assertRaises(RuntimeError, shouldThrow)
+        self.assertAfterWithManagerInvariantsWithError(mock_a)
+        self.assertAfterWithManagerInvariantsWithError(mock_b)
+        self.assertAfterWithGeneratorInvariantsWithError(self.foo)
+        self.assertAfterWithGeneratorInvariantsWithError(self.bar)
+
+    def testMultipleResourcesInSingleStatement(self):
+        cm_a = mock_contextmanager_generator()
+        cm_b = mock_contextmanager_generator()
+        mock_nested = MockNested(cm_a, cm_b)
+        def shouldThrow():
+            with mock_nested as (self.resource_a, self.resource_b):
+                self.assertInWithManagerInvariants(cm_a)
+                self.assertInWithManagerInvariants(cm_b)
+                self.assertInWithManagerInvariants(mock_nested)
+                self.assertInWithGeneratorInvariants(self.resource_a)
+                self.assertInWithGeneratorInvariants(self.resource_b)
+                self.raiseTestException()
+        self.assertRaises(RuntimeError, shouldThrow)
+        self.assertAfterWithManagerInvariantsWithError(cm_a)
+        self.assertAfterWithManagerInvariantsWithError(cm_b)
+        self.assertAfterWithManagerInvariantsWithError(mock_nested)
+        self.assertAfterWithGeneratorInvariantsWithError(self.resource_a)
+        self.assertAfterWithGeneratorInvariantsWithError(self.resource_b)
+
+    def testNestedExceptionBeforeInnerStatement(self):
+        mock_a = mock_contextmanager_generator()
+        mock_b = mock_contextmanager_generator()
+        self.bar = None
+        def shouldThrow():
+            with mock_a as self.foo:
+                self.assertInWithManagerInvariants(mock_a)
+                self.assertInWithGeneratorInvariants(self.foo)
+                self.raiseTestException()
+                with mock_b as self.bar:
+                    pass
+        self.assertRaises(RuntimeError, shouldThrow)
+        self.assertAfterWithManagerInvariantsWithError(mock_a)
+        self.assertAfterWithGeneratorInvariantsWithError(self.foo)
+
+        # The inner statement stuff should never have been touched
+        self.assertEqual(self.bar, None)
+        self.assertFalse(mock_b.context_called)
+        self.assertFalse(mock_b.enter_called)
+        self.assertFalse(mock_b.exit_called)
+        self.assertEqual(mock_b.exit_args, None)
+
+    def testNestedExceptionAfterInnerStatement(self):
+        mock_a = mock_contextmanager_generator()
+        mock_b = mock_contextmanager_generator()
+        def shouldThrow():
+            with mock_a as self.foo:
+                with mock_b as self.bar:
+                    self.assertInWithManagerInvariants(mock_a)
+                    self.assertInWithManagerInvariants(mock_b)
+                    self.assertInWithGeneratorInvariants(self.foo)
+                    self.assertInWithGeneratorInvariants(self.bar)
+                self.raiseTestException()
+        self.assertRaises(RuntimeError, shouldThrow)
+        self.assertAfterWithManagerInvariantsWithError(mock_a)
+        self.assertAfterWithManagerInvariantsNoError(mock_b)
+        self.assertAfterWithGeneratorInvariantsWithError(self.foo)
+        self.assertAfterWithGeneratorInvariantsNoError(self.bar)
+
+
+class NonLocalFlowControlTestCase(unittest.TestCase):
+
+    def testWithBreak(self):
+        counter = 0
+        while True:
+            counter += 1
+            with mock_contextmanager_generator():
+                counter += 10
+                break
+            counter += 100 # Not reached
+        self.assertEqual(counter, 11)
+
+    def testWithContinue(self):
+        counter = 0
+        while True:
+            counter += 1
+            if counter > 2:
+                break
+            with mock_contextmanager_generator():
+                counter += 10
+                continue
+            counter += 100 # Not reached
+        self.assertEqual(counter, 12)
+
+    def testWithReturn(self):
+        def foo():
+            counter = 0
+            while True:
+                counter += 1
+                with mock_contextmanager_generator():
+                    counter += 10
+                    return counter
+                counter += 100 # Not reached
+        self.assertEqual(foo(), 11)
+
+    def testWithYield(self):
+        def gen():
+            with mock_contextmanager_generator():
+                yield 12
+                yield 13
+        x = list(gen())
+        self.assertEqual(x, [12, 13])
+
+    def testWithRaise(self):
+        counter = 0
+        try:
+            counter += 1
+            with mock_contextmanager_generator():
+                counter += 10
+                raise RuntimeError
+            counter += 100 # Not reached
+        except RuntimeError:
+            self.assertEqual(counter, 11)
+        else:
+            self.fail("Didn't raise RuntimeError")
+
+
+class AssignmentTargetTestCase(unittest.TestCase):
+
+    def testSingleComplexTarget(self):
+        targets = {1: [0, 1, 2]}
+        with mock_contextmanager_generator() as targets[1][0]:
+            self.assertEqual(targets.keys(), [1])
+            self.assertEqual(targets[1][0].__class__, MockResource)
+        with mock_contextmanager_generator() as targets.values()[0][1]:
+            self.assertEqual(targets.keys(), [1])
+            self.assertEqual(targets[1][1].__class__, MockResource)
+        with mock_contextmanager_generator() as targets[2]:
+            keys = targets.keys()
+            keys.sort()
+            self.assertEqual(keys, [1, 2])
+        class C: pass
+        blah = C()
+        with mock_contextmanager_generator() as blah.foo:
+            self.assertEqual(hasattr(blah, "foo"), True)
+
+    def testMultipleComplexTargets(self):
+        class C:
+            def __context__(self): return self
+            def __enter__(self): return 1, 2, 3
+            def __exit__(self, *a): pass
+        targets = {1: [0, 1, 2]}
+        with C() as (targets[1][0], targets[1][1], targets[1][2]):
+            self.assertEqual(targets, {1: [1, 2, 3]})
+        with C() as (targets.values()[0][2], targets.values()[0][1], targets.values()[0][0]):
+            self.assertEqual(targets, {1: [3, 2, 1]})
+        with C() as (targets[1], targets[2], targets[3]):
+            self.assertEqual(targets, {1: 1, 2: 2, 3: 3})
+        class B: pass
+        blah = B()
+        with C() as (blah.one, blah.two, blah.three):
+            self.assertEqual(blah.one, 1)
+            self.assertEqual(blah.two, 2)
+            self.assertEqual(blah.three, 3)
+
+
+def test_main():
+    run_unittest(FailureTestCase, NonexceptionalTestCase,
+                 NestedNonexceptionalTestCase, ExceptionalTestCase,
+                 NonLocalFlowControlTestCase,
+                 AssignmentTargetTestCase)
+
+
+if __name__ == '__main__':
+    test_main()