Discussion on: What to Except When You're Excepting: Python error handling dos & don'ts

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Replies for: Thanks for the info. I started learning Python and found this a good source of tips for proper error handling. I have a question: def f2(x): ...

technically you don't, in this case, because of the return. but if you don't have a return you still need the else, and i'd argue it's clearer/more informative either way.

Duy K. Bui • Jul 24 '20 • Edited

So I will end up having nested try? As in

try:
    foo
except FooException:
    print "foo"
else:
    try:
        bar
    except BarException:
        print "bar"
    else:
        try:
            # ... so on so forth

sam • Jul 24 '20

potentially! but like i said, it might be worth refactoring those cases into separate functions

Duy K. Bui • Jul 24 '20

def wrap_foo:
    try:
        foo
    catch FooException:
        print "foo"

def wrap_bar:
    # same as above

def main:
    wrap_foo
    wrap_bar

Am I getting there?

sam • Jul 24 '20

yeah, depending on what you're trying to do—if everything's decoupled and bar doesn't depend on the success of foo, then this approach is the way to go