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BUG: Invalid dtypes comparison should not raise TypeError #19269

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merged 5 commits into from Jun 17, 2021

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@charris charris commented Jun 17, 2021

Backport of #19228.

Invalid dtypes comparison

Changes behavior of comparison to not raise TypeError when one of the operands cannot be converted to valid dtype.

Example:

>>> dtype = pd.date_range("2016-01-01", periods=2, tz="UTC").dtype
>>> dtype == np.dtype("datetime64[ns]")
False
>>> np.dtype("datetime64[ns]") == dtype
False

# Before:
>>> np.dtype("datetime64[ns]") == dtype
TypeError: Cannot interpret 'datetime64[ns, UTC]' as a data type

resolves #19187

@charris charris added this to the 1.21.0 release milestone Jun 17, 2021
@charris charris merged commit 143d45f into numpy:maintenance/1.21.x Jun 17, 2021
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@charris charris deleted the backport-19228 branch Jun 17, 2021
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