Use identity operator is when comparing to None
#45120
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…ackler Use identity operator `is` when comparing to None This is very minor, but idiomatic Python code uses `is` for comparisons to `None`. This is because semantically we want to compare to the "identity" of `None`, not its value. See [PEP8 for details](https://www.python.org/dev/peps/pep-0008/#programming-recommendations).
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This is very minor, but idiomatic Python code uses
isfor comparisons toNone. This is because semantically we want to compare to the "identity" ofNone, not its value.See PEP8 for details.