Peng Yu wrote:
I don't see any different between the following code in terms of
output. Are they exactly the same ('as' v.s. ',')?
try:
raise IOError('IOError')
except IOError as e:
print e
try:
raise IOError('IOError')
except IOError, e:
print e
The second form is the old form. Later versions of Python introduced the
first form because it is less confusing.
If you wanted a single 'except' to catch 2 exceptions you would need to
write:
try:
...
except (IOError, OSError):
...
Sometimes people who are new to Python mistakenly write:
try:
...
except IOError, OSError:
...
thinking that that form will catch 2 exceptions, and they'll then be
puzzled when it doesn't work properly.
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