Created on 2020-07-28 07:59 by jan.cespivo, last changed 2020-07-28 10:18 by serhiy.storchaka. This issue is now closed.
| Messages (4) | |||
|---|---|---|---|
| msg374476 - (view) | Author: Jan Češpivo (jan.cespivo) | Date: 2020-07-28 07:59 | |
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! |
|||
| msg374478 - (view) | Author: Ronald Oussoren (ronaldoussoren) *  |
Date: 2020-07-28 08:10 | |
I don't know if this limitation is intentional, but not that you can use an assignment expression when you enclose the expression with parenthesis: >>> assert (a:=1) >>> a 1 >>> |
|||
| msg374479 - (view) | Author: Jan Češpivo (jan.cespivo) | Date: 2020-07-28 08:14 | |
Hi Ronald, thank you. It works! :) |
|||
| msg374482 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2020-07-28 10:18 | |
It is a duplicate of issue39909. |
|||
| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2020-07-28 10:18:58 | serhiy.storchaka | set | status: open -> closed superseder: Assignment expression in assert causes SyntaxError nosy: + serhiy.storchaka messages: + msg374482 resolution: duplicate stage: resolved |
| 2020-07-28 08:14:46 | xtreak | set | nosy:
+ gvanrossum |
| 2020-07-28 08:14:35 | jan.cespivo | set | messages: + msg374479 |
| 2020-07-28 08:10:23 | ronaldoussoren | set | nosy:
+ ronaldoussoren messages: + msg374478 |
| 2020-07-28 07:59:37 | jan.cespivo | create | |