Steven D'Aprano <[email protected]> added the comment:
This is a operation precedence issue.
The line:
t0, t1 = t if t is not None else [], []
is parsed as:
(t if t is not None else []), []
so you need brackets around the "else" operand to get the effect you want.
t0, t1 = t if t is not None else ([], [])
----------
nosy: +steven.daprano
resolution: -> not a bug
stage: -> resolved
status: open -> closed
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Python tracker <[email protected]>
<https://bugs.python.org/issue43021>
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