New submission from Serhiy Storchaka <storchaka+cpyt...@gmail.com>:

There are several occurrences of type(literal) in the code of the stdlib where 
literal is a literal of built-in type: '', 1, [], {}, etc. I suppose it is a 
remnants of very old code written when str, int, list, dict, etc were functions 
and not classes.

The proposed PR replaces `type(literal)` with corresponding builtin types. It 
makes the code cleaner.

I consider also idea of replacing identity or equality checks ("is" or "==") 
with isinstance(). I suppose that that code was written when built-in  types 
were not subclassable. But now there is a reason to use isinstance().

See also issue44711.

----------
components: Library (Lib)
messages: 398002
nosy: serhiy.storchaka
priority: normal
severity: normal
status: open
title: Replace `type(literal)` with corresponding builtin types
versions: Python 3.11

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44712>
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