Dear Python developers,
The help(list) shows in a python console the following documentation
string for the list.sort() method.
sort(self, /, *, key=None, reverse=False)
| Sort the list in ascending order and return None.
|
| The sort is in-place (i.e. the list itself is modified) and
stable (i.e. the
| order of two equal elements is **maintained**).
Please notice the following inconsistency in Python3.10.0 and before of
a sort(reverse=True) result:
>>> L = [(1, 'a'), (2, 'b'), (1, 'c'), (2, 'd'), (3, 'e')]
>>> L.sort(reverse=True)
>>> L
>>> [(3, 'e'), (2, 'd'), (2, 'b'), (1, 'c'), (1, 'a')]
it should be:
>>> L = [(1, 'a'), (2, 'b'), (1, 'c'), (2, 'd'), (3, 'e')]
>>> reverseTuplesSort(L)
[(3, 'e'), (2, 'b'), (2, 'd'), (1, 'a'), (1, 'c')]
Same inconsistency appears when using a sorting key.
Passing easily unnoticed may produce unexpected and potentially wrong
ranking results.
Best Regards,
RB
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