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Clarify why we don't do hasattr(var, '__exit__).

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Michael W. Hudson 2004-06-18 11:41:03 +00:00
parent 28e33e4c96
commit c86e93c058
1 changed files with 3 additions and 2 deletions
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pep-0310.txt
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@ -68,8 +68,9 @@ Basic Syntax and Semantics
finally: finally:
var.__exit__() var.__exit__()
Note that this makes using an object that does not have an (The presence of an __exit__ method is *not* checked like that of
__exit__() method a fail-fast error. __enter__ to ensure that using inappropriate objects in with:
statements gives an error).
If the variable is omitted, an unnamed object is allocated on the If the variable is omitted, an unnamed object is allocated on the
stack. In that case, the suite has no access to the unnamed object. stack. In that case, the suite has no access to the unnamed object.