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Misc improvements to the itertools docs by rhettinger · Pull Request #119040 · python/cpython · GitHub
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Misc improvements to the itertools docs #119040

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Merged
rhettinger merged 7 commits into from
May 14, 2024
Merged

Misc improvements to the itertools docs #119040

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a014894
Remove self-evident comment in iter_index
rhettinger May 13, 2024
c4bfbfb
Use contextlib.suppress() instead of try/except
rhettinger May 13, 2024
7b82543
Simplify with "yield from"
rhettinger May 13, 2024
0eb2662
Simplify with "yield from"
rhettinger May 13, 2024
83f367c
Replace "it" with "iterable" in places where it helps.
rhettinger May 13, 2024
206cd5e
More accurate tee() equivalent with a shared data store
rhettinger May 14, 2024
4f2b6a8
Match the "return" style of the other equivalents
rhettinger May 14, 2024
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Use contextlib.suppress() instead of try/except
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@rhettinger
rhettinger committed May 13, 2024
commit c4bfbfb252b9162fb79a09d23793f9f2b4998164
9 changes: 3 additions & 6 deletions Doc/library/itertools.rst
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Expand Up @@ -800,6 +800,7 @@ and :term:`generators <generator>` which incur interpreter overhead.
.. testcode::

import collections
import contextlib
import functools
import math
import operator
Expand Down Expand Up @@ -949,23 +950,19 @@ and :term:`generators <generator>` which incur interpreter overhead.
else:
stop = len(iterable) if stop is None else stop
i = start
try:
with contextlib.suppress(ValueError):
while True:
yield (i := seq_index(value, i, stop))
i += 1
except ValueError:
pass

def iter_except(func, exception, first=None):
"Convert a call-until-exception interface to an iterator interface."
# iter_except(d.popitem, KeyError) → non-blocking dictionary iterator
try:
with contextlib.suppress(exception):
if first is not None:
yield first()
while True:
yield func()
except exception:
pass


The following recipes have a more mathematical flavor:
Expand Down