On Mon, Jul 29, 2019 at 2:58 PM Guido van Rossum <[email protected]> wrote:
> I am *guessing* the problem here is something like this:
>
> with open(filename) as f:
> data = f.read()
>
> raises an exception if the open() call fails, but putting try... except
> IOError: ... around the whole thing also catches I/O errors in the read()
> call (or anything else you might put in the body). Other solutions are more
> verbose and run other risks. For other types of context managers it may be
> worse because the error you want to catch occurs in the __enter__() call
> that's implicit in the with-clause (for open(), __enter__() is just "return
> self" since all the work happens before).
>
Isn't the appropriate solution to that one as follows? It's pretty clear
what you're trying to do, so the extra couple of lines aren't all that
obtrusive.
try:
f = open('x', 'r')
except IOError as whatever:
handle whatever
else:
with f:
data = f.read()
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