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Created on 2016-06-05 17:06 by acue, last changed 2022-04-11 14:58 by admin. This issue is now closed.
| Messages (3) | |||
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| msg267434 - (view) | Author: Arno-Can Uestuensoez (acue) | Date: 2016-06-05 17:06 | |
A single value terminated by a comma is assigned to be a tuple, even when missing parenthesis. a=(1) => a=1 OK/defined as a=(1,) => a=(1,) OK a=1, => a=(1,) ??? Is the latter intended? ------------------ In [4]: a=1, In [5]: print a (1,) In [6]: type(a) Out[6]: tuple ------------------- |
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| msg267436 - (view) | Author: Jelle Zijlstra (JelleZijlstra) *  |
Date: 2016-06-05 17:09 | |
Yes, this is intentional. It is documented in https://docs.python.org/3/reference/expressions.html#expression-lists: "The trailing comma is required only to create a single tuple" |
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| msg267438 - (view) | Author: Steven D'Aprano (steven.daprano) * |
Date: 2016-06-05 17:14 | |
Yes, it is intended. Commas create tuples, not parentheses. (With the exception of the empty tuple.) The parens are just for grouping and precedence. `1,` is a tuple, regardless of whether you use parens around it or not. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:32 | admin | set | github: 71421 |
| 2016-06-05 17:14:57 | steven.daprano | set | status: open -> closed nosy: + steven.daprano messages: + msg267438 resolution: not a bug stage: resolved |
| 2016-06-05 17:09:08 | JelleZijlstra | set | nosy:
+ JelleZijlstra messages: + msg267436 |
| 2016-06-05 17:06:46 | acue | create | |