Python: Definitions made in external shell get a bad `.__module__` attribute

I am making a wxPython app which supplies a shell for the user to use. (This is wx.lib.shell.PyShell, the shell that ships with wxPython.)

Problem is, definitions made in this shell have a bad .__module__ attribute. For example:

>>> def f(): 0
... 
>>> f.__module__
>>> f.__module__ is None
True
>>> class A(object):
...     pass
...     
>>> 
>>> A.__module__
'__builtin__'

I think the .__module__ attribute开发者_C百科 for both these objects should be __main__. Not sure. But it definitely shouldn't be either None or __builtin__.

How can I make the shell give a good .__module__ attribute to these functions and classes?

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In IDLE and in the wxPython Demo's PyShell demo, I get the following:

>>> def f(): 0

>>> f.__module__
'__main__'
>>> f.__module__ is None
False
>>> class A(object):
        pass

>>> A.__module__
'__main__'

It seems to work correctly to me. I'm not sure what you're doing on your machine. I am using Python 2.5, wxPython 2.8.10.1 on Windows XP.

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The reason this happened is because I was using a custom locals dict, and neglected to put a meaningful '__name__' in it. Once you put a '__name__' item in the locals dict you give to PyShell, its value will be used to set the .__module__ attribute for functions and classes defined in the shell.