On 15/08/2015 02:28, Clayton Kirkwood wrote:
try:
fp = open( user_preferences )
except( PermissionError ):
You need a pass statement here if you don't intend doing anything with
the error, but see my comments at the bottom.
else:
with open(user_preferences ) as f:
I originally only had the bottom open statement. Ran but file didn't exist,
and my run failed with file doesn't exist. I figured I'd check to see if the
file existed. This is one of those situations where a search of
documentation for fd_exist (which I thought I'd seen once), or exist turns
up either nothing or nothing relevant. I finally found that the try: clause
with the open statement might help and I copied the snippet to my code. I am
getting an indentation error: expected an indent block. What is wrong, and
what is the best way to find out if a file exists?
TIA,
Clayton
There's nothing to stop you using multiple except statements with one
try. So something like this is how I'd go about it.
try:
with open(user_preferences) as f:
do_something()
except PermissionError:
whatever()
except FileNotFoundError:
oh_heck()
etc.
Seee this for an explanation of exception handling
https://docs.python.org/3/tutorial/errors.html#handling-exceptions. A
full list of the exceptions you'd need to consider is here
https://docs.python.org/3/library/exceptions.html#os-exceptions
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
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