On Sunday 02 February 2003 08:21 pm, Samuele Pedroni wrote:
...
> with <expr>:
> <suite>
>
> would be possibly sugar for:
>
> _x = <expr>
> _x.__enter__()
> try:
> <suite>
> finally:
> _x.__exit__()
wouldn't a version:
with <identifier> = <expr>:
<suite>
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...?
Apart from this I cannot, offhand, think of any case that your 'with'
(perhaps with some tweaks such as making __enter__ optional, as
above mentioned) could not handle elegantly and effectively.
Alex
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