Question

When I write code in Python with exception handling I can write code like:

try:
    some_code_that_can_cause_an_exception()
except:
    some_code_to_handle_exceptions()
else:
    code_that_needs_to_run_when_there_are_no_exceptions()

How does this differ from:

try:
    some_code_that_can_cause_an_exception()
except:
    some_code_to_handle_exceptions()

code_that_needs_to_run_when_there_are_no_exceptions()

In both cases code_that_needs_to_run_when_there_are_no_exceptions() will execute when there are no exceptions. What’s the difference?

Answer 1

Actually, in the second snippet, the last line executes always.

You probably meant

try:
    some_code_that_can_cause_an_exception()
    code_that_needs_to_run_when_there_are_no_exceptions()
except:
    some_code_to_handle_exceptions()

I believe you can use the else version if it makes the code more readable. You use the else variant if you don’t want to catch exceptions from code_that_needs_to_run_when_there_are_no_exceptions.