bpo-36332: Allow compile() to handle AST objects with assignment expressions (GH-12398)
diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index a7ee0da..e39d1f2 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -135,6 +135,9 @@
"@deco1\n@deco2()\nclass C: pass",
# Decorator with generator argument
"@deco(a for a in b)\ndef f(): pass",
+ # Simple assignment expression
+ "(a := 1)",
+
]
# These are compiled through "single"
@@ -276,6 +279,13 @@
with self.subTest(action="compiling", input=i, kind=kind):
compile(ast_tree, "?", kind)
+ def test_ast_validation(self):
+ # compile() is the only function that calls PyAST_Validate
+ snippets_to_validate = exec_tests + single_tests + eval_tests
+ for snippet in snippets_to_validate:
+ tree = ast.parse(snippet)
+ compile(tree, '<string>', 'exec')
+
def test_slice(self):
slc = ast.parse("x[::]").body[0].value.slice
self.assertIsNone(slc.upper)
@@ -1677,6 +1687,7 @@
('Module', [('AsyncFunctionDef', (3, 0), 'f', ('arguments', [], None, [], [], None, []), [('Pass', (3, 15))], [('Name', (1, 1), 'deco1', ('Load',)), ('Call', (2, 0), ('Name', (2, 1), 'deco2', ('Load',)), [], [])], None, None)], []),
('Module', [('ClassDef', (3, 0), 'C', [], [], [('Pass', (3, 9))], [('Name', (1, 1), 'deco1', ('Load',)), ('Call', (2, 0), ('Name', (2, 1), 'deco2', ('Load',)), [], [])])], []),
('Module', [('FunctionDef', (2, 0), 'f', ('arguments', [], None, [], [], None, []), [('Pass', (2, 9))], [('Call', (1, 1), ('Name', (1, 1), 'deco', ('Load',)), [('GeneratorExp', (1, 5), ('Name', (1, 6), 'a', ('Load',)), [('comprehension', ('Name', (1, 12), 'a', ('Store',)), ('Name', (1, 17), 'b', ('Load',)), [], 0)])], [])], None, None)], []),
+('Module', [('Expr', (1, 0), ('NamedExpr', (1, 1), ('Name', (1, 1), 'a', ('Store',)), ('Constant', (1, 6), 1, None)))], []),
]
single_results = [
('Interactive', [('Expr', (1, 0), ('BinOp', (1, 0), ('Constant', (1, 0), 1, None), ('Add',), ('Constant', (1, 2), 2, None)))]),
diff --git a/Misc/NEWS.d/next/Core and Builtins/2019-03-18-09-27-54.bpo-36332.yEC-Vz.rst b/Misc/NEWS.d/next/Core and Builtins/2019-03-18-09-27-54.bpo-36332.yEC-Vz.rst
new file mode 100644
index 0000000..2c69c1c
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2019-03-18-09-27-54.bpo-36332.yEC-Vz.rst
@@ -0,0 +1,2 @@
+The builtin :func:`compile` can now handle AST objects that contain
+assignment expressions. Patch by Pablo Galindo.
diff --git a/Python/ast.c b/Python/ast.c
index 971b8dd..e9154fe 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -316,13 +316,14 @@
return validate_exprs(exp->v.List.elts, ctx, 0);
case Tuple_kind:
return validate_exprs(exp->v.Tuple.elts, ctx, 0);
+ case NamedExpr_kind:
+ return validate_expr(exp->v.NamedExpr.value, Load);
/* This last case doesn't have any checking. */
case Name_kind:
return 1;
- default:
- PyErr_SetString(PyExc_SystemError, "unexpected expression");
- return 0;
}
+ PyErr_SetString(PyExc_SystemError, "unexpected expression");
+ return 0;
}
static int