Éric Araujo <mer...@netwok.org> added the comment:

To clarify: Python 2.5 and higher support the with statement syntax, but not 
all classes that could benefit from it have the __enter__ and __exit__ methods. 
 So you don’t get a SyntaxError in Python 2.7 when you write “with Popen(...)”, 
but you get an AttributeError because Popen in 2.7 does not do its part to 
support context management.  The built-in open function, on the contrary, 
supports with in 2.5 and higher.

----------
resolution:  -> invalid
stage:  -> committed/rejected
status: open -> closed

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue13202>
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