Added a simple test program to disassemble a file, invoked as __main__.
diff --git a/Lib/dis.py b/Lib/dis.py
index a03784c..4c67642 100644
--- a/Lib/dis.py
+++ b/Lib/dis.py
@@ -251,3 +251,30 @@
def_op('CALL_FUNCTION', 131)
def_op('MAKE_FUNCTION', 132)
def_op('BUILD_SLICE', 133)
+
+
+def _test():
+ """Simple test program to disassemble a file."""
+ if sys.argv[1:]:
+ if sys.argv[2:]:
+ sys.stderr.write("usage: python dis.py [-|file]\n")
+ sys.exit(2)
+ fn = sys.argv[1]
+ if not fn or fn == "-":
+ fn = None
+ else:
+ fn = None
+ if not fn:
+ f = sys.stdin
+ else:
+ f = open(fn)
+ source = f.read()
+ if fn:
+ f.close()
+ else:
+ fn = "<stdin>"
+ code = compile(source, fn, "exec")
+ dis(code)
+
+if __name__ == "__main__":
+ _test()