New submission from Jan Češpivo <jan.cesp...@gmail.com>:

Hi,

it should be useful if assignment expression works within assertion.

For example (real use-case in tests):

assert r := re.match(r"result is (\d+)", tested_text)
assert int(r.group(1)) == expected_number

I haven't found a mention about assertions in 
https://www.python.org/dev/peps/pep-0572/ so it isn't technically a bug but it 
might be omission (?).

Thx!

----------
components: Interpreter Core
messages: 374476
nosy: jan.cespivo
priority: normal
severity: normal
status: open
title: SyntaxError: assignment expression within assert
type: behavior
versions: Python 3.8

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue41417>
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