[Python] How to perform assignment destructuring using the walrus operator in Python

I can do an assignment destructuring as:

a, b = s.split(' ', 1)


for a string s which has more than one word.

How can we do the same in, say an if or elif, with the latest assignment expression introduced in Python 3.8 (is it possible to have multiple targets) ?

I tried:

if some_thing:
# some code.
elif (a, b := s.split(' ', 1)) and some_func(a) and some_func(b):
# some code probably using a and b as well.

I get following error:

elif (a, b := s.split(' ', 1)) and some_func(a) and some_func(b):
NameError: name 'a' is not defined


The reason I want this is because I don't want to split my string unnecessarily if my first condition is satisfied.

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