bpo-40755: Add missing multiset operations to Counter() - #20339

Merged

rhettinger merged 14 commits into

python:masterfrom

rhettinger:counter_subset

May 28, 2020

Commits on May 24, 2020

Add basic definitions and invariants
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538878c
Neaten-up
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ce91225
Add blurb
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c160f82
Remove the NotImplemented return values
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987532f
Handle iterable inputs. Add some tests
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6a471a1
Clean-up section on omitted operations
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db9e0e6
Improve clarity by separating element values
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160b365
Add tests. Handle negative values.
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9c3e9a6
Isolate the predicate tests with negative counts
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8fc2b87
Optimized early-out versions. Beef-up docstrings.
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fdbe0c1
Clean-ups and optimization for the common case
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5e20521
Add documentation
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19a8b27
Use subset and superset symbols
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74c471d

Commits on May 26, 2020

Fix typo in docstring
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f26a84a