What's the advantage of a trailing underscore in Python naming?

Question

I am used to naming Python arguments in this way:

my_argument=\'foo\'

what\'s the advantage if I do this instead:

my_argum         


        

Answer 1

Exactly what it gives in the PEP: it allows you to use something that would otherwise be a Python keyword.

as_
with_
for_
in_

Answer 2

PEP8 does not recommend this naming convention, except for names that would otherwise conflict with keywords. my_argument obviously does not conflict, so there is no reason to use an underscore and PEP8 does not recommend that you do.

Answer 3

Usually naming conventions like this don't have any empiric purpose in python (i.e. they don't do anything special) aside from avoiding conflict between keywords. For example, you wouldn't name a variable class would you? You'd name it class_ to avoid conflict with the built-in keyword.