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Fix #316: Return NotImplemented for comparisons #318

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Merged
merged 1 commit into from
Nov 8, 2020
Merged

Fix #316: Return NotImplemented for comparisons #318

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10 changes: 10 additions & 0 deletions changelog.d/316.trivial.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
Comparisons of :class:`~semver.version.Version` class and other
types return now a :py:const:`NotImplemented` constant instead
of a :py:exc:`TypeError` exception.

The `NotImplemented`_ section of the Python documentation recommends
returning this constant when comparing with ``__gt__``, ``__lt__``,
and other comparison operators to "to indicate that the operation is
not implemented with respect to the other type".

.. _NotImplemented: https://docs.python.org/3/library/constants.html#NotImplemented
4 changes: 1 addition & 3 deletions src/semver/version.py
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Expand Up @@ -72,9 +72,7 @@ def wrapper(self: "Version", other: Comparable) -> bool:
*String.__args__, # type: ignore
)
if not isinstance(other, comparable_types):
raise TypeError(
"other type %r must be in %r" % (type(other), comparable_types)
)
return NotImplemented
return operator(self, other)

return wrapper
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