[New-bugs-announce] [issue37632] generator expression doesn't find subclass

[Ákos Tompos]

New submission from Ákos Tompos <akos.brain at gmail.com>:

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

----------
messages: 348181
nosy: Ákos Tompos
priority: normal
severity: normal
status: open
title: generator expression doesn't find subclass
versions: Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37632>
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