Alex Martelli <aleax@aleax.it> writes:
> be helpful too? Meaning to use local variable <identifier> in lieu of
> the abstract _x -- for example in order to enable:
>
> with myfile = auto_closing_file('blah.txt', 'rb'):
> xx = myfile.read(23)
> # rest of suite snipped
>
> where auto_closing_file is a subclass of file defining useful __enter__
> (empty -- might be nice to have it optional...) and __exit__ = close
> synonyms (or file itself might grow __exit__ as a synonym for close).
>
> How would I do this elegantly without the assignment...?
Just as you do with if:
myfile = auto_closing_file('blah.txt', 'rb')
with myfile:
xx = myfile.read(23)
# rest of suite snipped
Maybe not quite as elegant as allowing assignment in with but very
similar to the normal try...final version:
myfile = auto_closing_file('blah.txt', 'rb')
try:
xx = myfile.read(23)
# rest of suite snipped
finally:
myfile.close()
Bernhard
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