Python if does not equal none

Describes the cause and action for error messages.


Error Message(English):
if does not equal none

Resolution


関連リンク


Pythonでヌルオブジェクトの比較 - Qiita
https://qiita.com/tortuepin/items/44fdb63cc82dfd260575

Python基礎講座(8 分岐) - Qiita
https://qiita.com/Usek/items/e63fd930a31c6faad856

PythonではNoneの比較は==ではなくisを使う - こんにちはこんにちは ...
http://monmon.hateblo.jp/entry/20110214/1297710749

Python `if x is not None` or `if not x is None`? - Stack Overflow
https://stackoverflow.com/questions/2710940/python-if-x-is-not-none-or-if-not-x-is-none

How to "test" NoneType in python?
https://stackoverflow.com/questions/23086383/how-to-test-nonetype-in-python

Python None comparison: should I use "is" or ==?
https://stackoverflow.com/questions/14247373/python-none-comparison-should-i-use-is-or

Python != operation vs "is not"
https://stackoverflow.com/questions/2209755/python-operation-vs-is-not

not None test in Python
https://stackoverflow.com/questions/3965104/not-none-test-in-python

Comparing things to None the wrong way ? Python Anti-Patterns ...
https://docs.quantifiedcode.com/python-anti-patterns/readability/comparison_to_none.html

Python: Booleans and None - Amir Rachum's Blog
https://amir.rachum.com/blog/2012/08/25/you-cant-handle-the-truth/



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