Mark Dickinson added the comment:
I should note that this patch fixes/changes one other aspect of slice.indices:
namely that it used to accept a negative length, and return essentially
meaningless results in that case:
>>> slice(0, 10, 1).indices(-3)
(-3, -3, 1)
With the patch, it now raises ValueError if given a negative length:
>>> slice(0, 10, 1).indices(-3)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: length should not be negative
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<http://bugs.python.org/issue14794>
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