DEPR: unsupported dt64/td64 dtypes in pd.array

doc/source/whatsnew/v3.0.0.rst

@@ -207,6 +207,7 @@ Removal of prior version deprecations/changes
 - All arguments except ``name`` in :meth:`Index.rename` are now keyword only (:issue:`56493`)
 - All arguments except the first ``path``-like argument in IO writers are now keyword only (:issue:`54229`)
 - Disallow passing a pandas type to :meth:`Index.view` (:issue:`55709`)
+- Disallow units other than "s", "ms", "us", "ns" for datetime64 and timedelta64 dtypes in :func:`array` (:issue:`53817`)
 - Removed "freq" keyword from :class:`PeriodArray` constructor, use "dtype" instead (:issue:`52462`)
 - Removed deprecated "method" and "limit" keywords from :meth:`Series.replace` and :meth:`DataFrame.replace` (:issue:`53492`)
 - Removed the "closed" and "normalize" keywords in :meth:`DatetimeIndex.__new__` (:issue:`52628`)

pandas/core/construction.py

@@ -15,7 +15,6 @@
     cast,
     overload,
 )
-import warnings
 
 import numpy as np
 from numpy import ma
@@ -35,7 +34,6 @@
     DtypeObj,
     T,
 )
-from pandas.util._exceptions import find_stack_level
 
 from pandas.core.dtypes.base import ExtensionDtype
 from pandas.core.dtypes.cast import (
@@ -373,13 +371,10 @@ def array(
         return TimedeltaArray._from_sequence(data, dtype=dtype, copy=copy)
 
     elif lib.is_np_dtype(dtype, "mM"):
-        warnings.warn(
+        raise ValueError(
+            # GH#53817
             r"datetime64 and timedelta64 dtype resolutions other than "
-            r"'s', 'ms', 'us', and 'ns' are deprecated. "
-            r"In future releases passing unsupported resolutions will "
-            r"raise an exception.",
-            FutureWarning,
-            stacklevel=find_stack_level(),
+            r"'s', 'ms', 'us', and 'ns' are no longer supported."
         )
 
     return NumpyExtensionArray._from_sequence(data, dtype=dtype, copy=copy)

pandas/tests/arrays/test_array.py

@@ -1,6 +1,5 @@
 import datetime
 import decimal
-import re
 
 import numpy as np
 import pytest
@@ -31,15 +30,13 @@
 
 @pytest.mark.parametrize("dtype_unit", ["M8[h]", "M8[m]", "m8[h]"])
 def test_dt64_array(dtype_unit):
-    # PR 53817
+    # GH#53817
     dtype_var = np.dtype(dtype_unit)
     msg = (
         r"datetime64 and timedelta64 dtype resolutions other than "
-        r"'s', 'ms', 'us', and 'ns' are deprecated. "
-        r"In future releases passing unsupported resolutions will "
-        r"raise an exception."
+        r"'s', 'ms', 'us', and 'ns' are no longer supported."
     )
-    with tm.assert_produces_warning(FutureWarning, match=re.escape(msg)):
+    with pytest.raises(ValueError, match=msg):
         pd.array([], dtype=dtype_var)