Hello,
It seems that I can mutate a deque while iterating over it if I
assign to an index, but not if I append to it. Is this the intended
behaviour? It seems a bit inconsistent. Cheers.
Duncan
>>> from collections import deque
>>> d = deque(range(8))
>>> it = iter(d)
>>> next(it)
0
>>> d[1] = 78
>>> next(it)
78
>>> d.append(8)
>>> next(it)
Traceback (most recent call last):
File "<pyshell#650>", line 1, in <module>
next(it)
RuntimeError: deque mutated during iteration
>>>
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