[issue17939] Misleading information about slice assignment in docs

[Terry J. Reedy]

Terry J. Reedy added the comment:

Since range objects have a known length, that example is not enough to show 'any iterable'. However, generators do not even have a __length_hint__ and they work too.

a = [1,2,3]
a[0:1] = (i for i in range(4))
print(a)
>>> 
[0, 1, 2, 3, 2, 3]

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nosy: +terry.reedy

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<http://bugs.python.org/issue17939>
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