New submission from Dan Rose <[email protected]>:
In the Python 3.7.0 interpreter, the following evaluates to False. In 3.6.4, it
was True:
c,d = 500,500
c is d
This seems to be because, in some cases, Python 3.7 fails to intern integers
inside tuples:
a = (500,500)
print(a[0] is a[1]) # False
a = (500,500,42)
print(a[0] is a[1]) # False
a = (500,500,'42')
print(a[0] is a[1]) # False
answer = 42
a = (500,500,answer)
print(a[0] is a[1]) # True
a = (500,500,[42])
print(a[0] is a[1]) # True
a = [500,500]
print(a[0] is a[1]) # True
I believe the above should all return True.
----------
messages: 321495
nosy: Dan Rose
priority: normal
severity: normal
status: open
title: Python doesn't intern integers in a tuple of constant literals
type: behavior
versions: Python 3.7
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Python tracker <[email protected]>
<https://bugs.python.org/issue34100>
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