[issue34978] check type of object in fix_dict.py in 2to3

[Pranav Devarakonda]

New submission from Pranav Devarakonda <devarakondapranav at yahoo.com>:

fix_dict.py applies fixes to every instance of keys(), items() or values() irrespective of the type of object. Since 2to3 cannot check the type of the object, we can at least add the check to the generated code like...

d.keys() -> list(d.keys) if type(d) == dict else d.keys()
and similarly 

d.viewkeys() -> d.keys() if type(d) == dict else d.viewkeys()

PFA the tweaked fixer.

----------
components: 2to3 (2.x to 3.x conversion tool)
files: fix_dict.py
messages: 327682
nosy: benjamin.peterson, devarakondapranav
priority: normal
severity: normal
status: open
title: check type of object in fix_dict.py in 2to3
type: enhancement
Added file: https://bugs.python.org/file47866/fix_dict.py

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34978>
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