Hello,
I would like to know what would be considered the most
Pythonic way of handling errors when dealing with files,
solutions that seem reasonable using 2.5:
-------
try:
f = open('afile', 'r')
content = f.read()
error = 200
except Exception:
error = 404
finally:
if locals().has_key('f'):
f.close()
------
try:
f = open('afile', 'r')
content = f.read()
except Exception:
error = 404
else:
error = 200
finally:
if locals().has_key('f'):
f.close()
-------
try:
f = open('afile', 'r')
content = f.read()
error = 200
except Exception:
error = 404
finally:
try:
f.close()
except Exception:
pass
-------
try:
f = None
f = open('afile', 'r')
content = f.read()
error = 200
except Exception:
error = 404
finally:
if f:
f.close()
----
try:
with open('afile', 'r') as f:
content = f.read()
error = 200
except Exception:
error = 404
----
Of the above I think I like the last one best, but I think
I'd really like to have:
with open('afile', 'r') as f with exceptions:
content = f.read()
error = 200
except Exception:
error = 404
Another words from looking at PEP343 it is the author
of the object returned by the with expression that gets
to decide if exceptions are re-raised. But it would seem
to me it should be the programmer using it that should
decide.
Of course as a newbie, I may be way off base.
Thanks,
Wink Saville
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