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Re:Strict Python function parameters by toyg on Sunday January 23, 2022 @11:44AM (#30047622)
Although "if bar is None:" is the explicit form, the common idiomatic one is "if not bar:" (unless it's acceptable for bar to be 0).
Re:Strict Python function parameters by dragonwriter on Sunday January 23, 2022 @03:36PM (#30050186)
> unless it's acceptable for bar to be 0

Or an empty list.

Or any other falsish value.