How to break a long with statement in python

Question

I have a line of code in python like this:

with long_name_function(p) as a, other_long_name_function():

and I want to break it in multiple lines, because is too long, I could use backslashes, but they are considered a bad practice. I also could use contextlib.nested, but is deprecated, is there any other alternative?

Answer 1

This disregards the premise of the question but I would actually recommend using backslashes in this case:

with really_really_long_name_function(p) as f1, \
        other_really_really_long_name_function() as f2:
    pass

As @JonClements said, you can't use brackets or commas in this case, there's no alternative so backslashes are the way to go and the code looks pretty clean IMO.

Answer 2

If you want to avoid backslashes, you can alias the long names:

lnf = long_name_function
olnf = other_long_name_function
with lnf(p) as a, olnf():
    # ...

or you could nest the statements:

with long_name_function(p) as a:
    with other_long_name_function():
        pass

You do not want to use contextlib.nested() ; there are several problems with it that directly led to its deprecation. Earlier context managers are not covered for problems with later context managers in the nesting, for example.