8000 bpo-40755: Add missing multiset operations to Counter() by rhettinger · Pull Request #20339 · python/cpython · GitHub
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bpo-40755: Add missing multiset operations to Counter() #20339

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Merged
merged 14 commits into from
May 28, 2020
Merged

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

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538878c
Add basic definitions and invariants
rhettinger May 24, 2020
ce91225
Neaten-up
rhettinger May 24, 2020
c160f82
Add blurb
rhettinger May 24, 2020
987532f
Remove the NotImplemented return values
rhettinger May 24, 2020
6a471a1
Handle iterable inputs. Add some tests
rhettinger May 24, 2020
db9e0e6
Clean-up section on omitted operations
rhettinger May 24, 2020
160b365
Improve clarity by separating element values
rhettinger May 24, 2020
9c3e9a6
Add tests. Handle negative values.
rhettinger May 24, 2020
8fc2b87
Isolate the predicate tests with negative counts
rhettinger May 24, 2020
fdbe0c1
Optimized early-out versions. Beef-up docstrings.
rhettinger May 24, 2020
5e20521
Clean-ups and optimization for the common case
rhettinger May 24, 2020
19a8b27
Add documentation
rhettinger May 24, 2020
74c471d
Use subset and superset symbols
rhettinger May 24, 2020
f26a84a
Fix typo in docstring
rhettinger May 26, 2020
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Remove the NotImplemented return values
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@rhettinger
rhettinger committed May 24, 2020
commit 987532ff02846ffb7c162b4d75d6079366823ac3
6 changes: 0 additions & 6 deletions Lib/collections/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -894,20 +894,14 @@ def isequal(self, other):
Unlike the __eq__() method, this test ignores counts that
are zero or negative.
'''
if not isinstance(other, Counter):
return NotImplemented
return +self == +other

def issubset(self, other):
'True if positive counts in self <= counts in other.'
if not isinstance(other, Counter):
return NotImplemented
return not self - other

def issuperset(self, other):
'True if positive counts in self >= counts in other.'
if not isinstance(other, Counter):
return NotImplemented
return not other - self

def isdisjoint(self, other):
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0