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Created on 2019-07-19 15:28 by Ákos Tompos, last changed 2022-04-11 14:59 by admin. This issue is now closed.
| Messages (3) | |||
|---|---|---|---|
| msg348181 - (view) | Author: Ákos Tompos (Ákos Tompos) | Date: 2019-07-19 15:28 | |
The following code does work on python 2.7 but fails on python 3.7. The code seems correct.
class A:
class B:
def __init__(self, param):
self.param = param
l = [B(i) for i in range(10)]
The result on:
3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 22:22:05) [MSC v.1916 64 bit (AMD64)]
Traceback (most recent call last):
File "test.py", line 6, in <module>
class A:
File "test.py", line 11, in A
l = [B(i) for i in range(10)]
File "test.py", line 11, in <listcomp>
l = [B(i) for i in range(10)]
NameError: name 'B' is not defined
B can be accessed if not inside a generator expression
|
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| msg348184 - (view) | Author: Karthikeyan Singaravelan (xtreak) *  |
Date: 2019-07-19 16:52 | |
I think it's about a class being defined inside another class and not about subclass. This seems to be similar to https://bugs.python.org/issue3692 that discusses about class attribute scope for comprehension. |
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| msg348190 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2019-07-19 18:37 | |
This is a duplicate of issue3692. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:18 | admin | set | github: 81813 |
| 2019-07-19 18:37:02 | serhiy.storchaka | set | status: open -> closed superseder: improper scope in list comprehension, when used in class declaration nosy: + serhiy.storchaka messages: + msg348190 resolution: duplicate stage: resolved |
| 2019-07-19 16:52:59 | xtreak | set | nosy:
+ xtreak messages: + msg348184 |
| 2019-07-19 15:28:48 | Ákos Tompos | create | |