[Python-ideas] Map and filter should also convert StopIteration to RuntimeError

[Alexander Belopolsky]

On Fri, Dec 12, 2014 at 4:14 PM, Terry Reedy <tjreedy at udel.edu> wrote:

> I propose that map.__next__ convert StopIteration raised by func to
> RuntimeError


Aren't we stepping on a slippery slope here?  What about say

>>> def f(x, y):
...     if x > 2:
...         raise StopIteration
...     return x + y
...
>>> import itertools
>>> itertools.accumulate(range(10), f)
<itertools.accumulate object at 0x10acc0fc8>
>>> list(_)
[0, 1, 3]
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