New submission from Serhiy Storchaka:
Usually string literals are interned. But not if they are a part of constant
tuple.
>>> def abc(): pass
...
>>> x = 'abc'
>>> x is abc.__name__
True
>>> x = ('abc',)
>>> x[0] is abc.__name__
False
This makes effect on namedtuples (issue25981). May make effect on __slots__ or
other uses of constant tuples since searching a value in a tuple when values
are not identical is a little slower that when they are identical.
----------
components: Interpreter Core
messages: 258542
nosy: benjamin.peterson, brett.cannon, georg.brandl, haypo, ncoghlan,
rhettinger, serhiy.storchaka, yselivanov
priority: normal
severity: normal
status: open
title: String literals are not interned if in a tuple
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26148>
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