On Mo, 2008-01-07 at 21:15 -0300, Ricardo Aráoz wrote: > Kent Johnson wrote: > > Ricardo Aráoz wrote: > >> PEP 0343 is not an > >> example of clarity in the definition of a statement, it mixes > >> justification with historic development with definition with actual > >> equivalent code. Couldn't or wouldn't bother to understand it. > > > > Here is a better starting point: > > http://docs.python.org/whatsnew/pep-343.html > > > > Kent > > > > Thanks Kent, it's clearer, but it gets rapidly complicated. Anyway > looking at the simpler use, if you would have exception handling in : > > try : > with open('/etc/passwd', 'r') as f: > for line in f: > print line > ... more processing code ... > except ExceptionsOnOpening : > ... exception handling > except : > ... exceptions inside the for > > > > Whereas traditionally : > > try : > f = open('/etc/passwd', 'r') > for line in f: > print line > ... more processing code ... > except ExceptionsOnOpening : > ... exception handling > except : > ... exceptions inside the for
Hi Ricardo, don't forget the "f.close()" call after the for loop, in a finally block [0]. Context managers are all about generalizing non-adjacent parts of setup and teardown code Actually, the fact that you forgot the close call is an argument for using the context manager;) best, Torsten [0] http://docs.python.org/lib/bltin-file-objects.html -- Torsten Marek <[EMAIL PROTECTED]> ID: A244C858 -- FP: 1902 0002 5DFC 856B F146 894C 7CC5 451E A244 C858 Keyserver: subkeys.pgp.net
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