fix: pd.to_numeric handling of datetime #62642
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This PR handles all the cases of inconsistent datetime to_numeric handling from Issue 42380
The changes in
pandas/_libs/lib.pyx, is the core logic for datetime handling, and is a singular place which handles scalar values,pd.SeriesandSeries(input_value).apply(partial(to_numeric))The removal of
elif lib.is_np_dtype(values_dtype, "mM"): values = values.view(np.int64)in pandas/core/tools/numeric.py, addresses the bug where int value of NaT are returned.pd.to_numerichas an inconsistent behavior fordatetimeobjects #43280pd.to_numerichas an inconsistent behavior fordatetimeobjects #43280 and related linked PR discussionsdoc/source/whatsnew/v3.0.0.rstfile