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Uwe L. Korn updated ARROW-2423: ------------------------------- Labels: (was: pull-request-available) > [Python] PyArrow datatypes raise ValueError on equality checks against > non-PyArrow objects > ------------------------------------------------------------------------------------------ > > Key: ARROW-2423 > URL: https://issues.apache.org/jira/browse/ARROW-2423 > Project: Apache Arrow > Issue Type: Bug > Components: Python > Affects Versions: 0.9.0 > Environment: Mac OS High Sierra > PyArrow 0.9.0 (py36_1) > Python 3.6.3 > Reporter: Dave Challis > Priority: Minor > > Checking a PyArrow datatype object for equality with non-PyArrow datatypes > causes a `ValueError` to be raised, rather than either returning a True/False > value, or returning > [NotImplemented|https://docs.python.org/3/library/constants.html#NotImplemented] > if the comparison isn't implemented. > E.g. attempting to call: > {code:java} > import pyarrow > pyarrow.int32() == 'foo' > {code} > results in: > {code:java} > Traceback (most recent call last): > File "types.pxi", line 1221, in pyarrow.lib.type_for_alias > KeyError: 'foo' > During handling of the above exception, another exception occurred: > Traceback (most recent call last): > File "t.py", line 2, in <module> > pyarrow.int32() == 'foo' > File "types.pxi", line 90, in pyarrow.lib.DataType.__richcmp__ > File "types.pxi", line 113, in pyarrow.lib.DataType.equals > File "types.pxi", line 1223, in pyarrow.lib.type_for_alias > ValueError: No type alias for foo > {code} > The expected outcome for the above would be for the comparison to return > `False`, as that's the general behaviour for comparisons between objects of > different types (e.g. `1 == 'foo'` or `object() == 12.4` both return `False`). -- This message was sent by Atlassian JIRA (v7.6.3#76005)