[New-bugs-announce] [issue29008] Can't do dict comp from previously defined dict in the outermost scope of class defintion

[Dan Snider]

New submission from Dan Snider:

class MyClass:
    a_dict = {'key':'value'}
    r_dict = {a_dict[k]:k for k in a_dict}
    
throws the error: 

Traceback (most recent call last):
  File "C:/Users/D/AppData/Local/Programs/Python/Python35-32/deleteme.py", line 1, in <module>
    class MyClass:
  File "C:/Users/D/AppData/Local/Programs/Python/Python35-32/deleteme.py", line 3, in MyClass
    r_dict = {a_dict[k]:k for k in a_dict}
  File "C:/Users/D/AppData/Local/Programs/Python/Python35-32/deleteme.py", line 3, in <dictcomp>
    r_dict = {a_dict[k]:k for k in a_dict}
NameError: name 'a_dict' is not defined

----------
assignee: terry.reedy
components: IDLE, Interpreter Core, Windows
messages: 283575
nosy: Assume_Away, paul.moore, steve.dower, terry.reedy, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: Can't do dict comp from previously defined dict in the outermost scope of class defintion
type: behavior
versions: Python 3.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29008>
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