BUG/API: comparison datetime64-vs-dates (original) (raw)

ser = pd.Series(["2016-01-01"], dtype="date32[pyarrow]") ser2 = ser.astype("timestamp[ns][pyarrow]") ser3 = ser.astype("datetime64[ns]")

assert (ser3 != ser[0]).all() assert (ser3 != ser).all()

assert (ser == ser3).all() # <- uh-oh! inconsistent with reversed operation assert (ser == ser2).all() # inconsistent with the non-pyarrow behavior assert (ser2 == ser).all()

Long ago we made a decision that datetime64 arrays (and Timestamp) were not comparable to date objects, matching the stdlib behavior. We should have that behavior for pyarrow dtypes too.