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Sun Nov 15 20:55:00 CET 2009 · https://mail.python.org/pipermail/python-dev/2009-November/094263.html

Python currently accepts global statements at the top level:
>>> global foo
>>>

Beside being a meaningless operation, this might lead unexperienced
user to make mistakes like:
>>> foo = 5
>>> global foo # make foo global
>>> def func():
...   print foo # access the global foo
...
>>> func()
5
>>> # it works!

"global foo" should raise a SyntaxError, similarly to what already
happens with "return":
>>> return foo
  File "<stdin>", line 1
SyntaxError: 'return' outside function

I opened an issue on the tracker (http://bugs.python.org/issue7329)
and Benjamin suggested to discuss this here.
The test he mentioned is in test_global.py:

    def test4(self):
        prog_text_4 = """\
global x
x = 2
"""
        # this should work
        compile(prog_text_4, "<test string>", "exec")

It just says that "it should work" but it doesn't say /why/.

Any thoughts?

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Showing content from https://mail.python.org/pipermail/python-dev/2009-November/094263.html below:

[Python-Dev] global statements outside functions/methods should raise SyntaxError