CODEWITHSUNDEEP
pythonpython-2.7exceptiontry-catch
umbe1987
umbe1987

Reputation: 3578

python - move on after exception and raise it afterwards

I think this should be a bit tricky but somehow feasible, but I need help. I'd like to execute two functions from within my main() func. I'd like to be able to catch exceptions from the two separately, but still being able to execute both and get the result of at least one of them if the other raises an exception.

Let's say I have:

def foo():
    raise TypeError

def bar():
    return 'bar'

If I do (adapted from here):

def multiple_exceptions(flist):
    for f in flist:
        try:
            return f()
        except:
            continue

def main():
    multiple_exceptions([foo, bar])

main()

main() would return 'bar', but I'd like to be able to still throw the exception from foo() after all. This way, I would still have the result of one of my functions and the information on the error occurred in the other.

Upvotes: 0

Views: 2527

Answers (2)

umbe1987
umbe1987

Reputation: 3578

Thanks for the comments. I solved by doing this:

def multiple_exceptions(flist):

    exceptions = []

    for f in flist:
        try:
            f()
        except Exception as  e:
            exceptions.append(e.message)
            continue

    return exceptions

def main():
    multiple_exceptions([foo, bar])

error_messages = main() # list of e.messages occurred (to be raised whenever I want)

Then I can raise my exception like e.g. raise Exception(error_messages[0]) (I only care about the first in this case let's say).

Upvotes: 0

jkm
jkm

Reputation: 704

You can capture and store the exceptions using 'as', e.g.:

try:
    raise Exception('I am an error!')
    print('The poster messed up error-handling code here.') #should not be displayed
except Exception as Somename:
    print(Somename.message) 
    # you'll see the error message displayed as a normal print result; 
    # you could do print(stuff, file=sys.stderr) to print it like an error without aborting

print('Code here still works, the function did not abort despite the error above')

...or you can do:
except Exception as Somename:
    do_stuff()
    raise Somename

Upvotes: 1

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