[issue46224] doc: Fix bisect example using mutable function default

[Dennis Sweeney]

Dennis Sweeney <sweeney.dennis650 at gmail.com> added the comment:

Another option would be to use globals:

>>> BREAKPOINTS = [60, 70, 80, 90]
>>> GRADES = "FDCBA"
>>> def grade(score):
...     i = bisect(BREAKPOINTS, score)
...     return GRADES[i]
... 
>>> [grade(score) for score in [33, 99, 77, 70, 89, 90, 100]]
['F', 'A', 'C', 'C', 'B', 'A', 'A']

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nosy: +Dennis Sweeney

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46224>
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