New submission from John Zalewski <[email protected]>:
#The 'Walrus' operator does not support multiple assignment but does not #flag
an attempt to make a multiple assigment as an error
#This results in unexpected behavior at execution time:
a, b = 100, 200
print (a, b)
#result is
#100 200
if (a, b := 3, 4): #this should be flagged as an error but is not
print ("found true")
else:
print ("found false")
print (a, b)
#result is
#100 3 but if multiple assigment were allowed this would be '3, 4'
----------------------------------------------------------------------
Python 3.9.0 (tags/v3.9.0:9cf6752, Oct 5 2020, 15:34:40) [MSC v.1927 64 bit
(AMD64)] on win32
Type "help", "copyright", "credits" or "license()" for more information.
>>>
= RESTART: C:\Users\John PC
2017\AppData\Local\Programs\Python\Python38-32\walrustest.py
100 200
found true
100 3
>>>
----------
files: walrustest.py
messages: 380580
nosy: JohnPie
priority: normal
severity: normal
status: open
title: Error should be flagged if Walrus operator is used for multiple assigment
type: compile error
versions: Python 3.9
Added file: https://bugs.python.org/file49583/walrustest.py
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Python tracker <[email protected]>
<https://bugs.python.org/issue42295>
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