Code

GH-100485: Add math.sumprod()#100677

Code

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rhettinger merged 43 commits intopython:mainpython/cpython:mainfrom

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Jan 7, 2023

Commits

Commits on Jan 1, 2023

• Stub function.

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• Core fuctionality without error handling

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Commits on Jan 2, 2023

• Test core functionality.

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• Add docs

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• Check for non-iterable inputs

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• Handle uneven lengths and error returns from PyIter_Next().

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• Handle errors arising during the multiplications or additions.

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• Test special values

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• Add blurb

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• Regenerate clinic files

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Commits on Jan 3, 2023

• Beautify with booleans.

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• Add int_path. Needs work on refcount and addition overflow.

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• Add more assertions and refcount fixes

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• Only test for ints when iterators are not stopped.

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• Test long addition for overflow

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• Improve wording regarding extended precision.

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• Add the "finished" summary variable for readability.

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Commits on Jan 4, 2023

• Add flt path

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• add flt/int path

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• .

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• Merge branch 'sumprod4' into sumprod

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• Update docs and docstrings.

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• Fix typo

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• Use extended precision for float/float and int/float cases.

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• Brevity is the soul of wit.

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• Beautification.

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Commits on Jan 5, 2023

• Various minor improvments

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• Fully encapsulate the dl (double length) logic.

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• Add performance comment.

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• Write tight.

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• Abbreviate comment.

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• Remove case for int/int while float in use.

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• Beautify dl_add()

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• Add stress tests.

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• Update itertools recipe to reflect the promotion.

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• Remove doctest for dotproduct().

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Commits on Jan 6, 2023

• Speed-up iterator access. Let float be selected by bools.

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• Add assertion for a key checkpoint

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• Move dl_mul() out to a separate function. Dekker (5.8).

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• Add the smaller magnitude component first.

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Commits on Jan 7, 2023

• Use Dekker (5.12) directly. Avoids calling dl_add() and saves a comparison.

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• Update timing in comment.

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• Add in the large component first.

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