ruff

pandas/errors/__init__.py

@@ -1045,6 +1045,15 @@ class TimezoneDtypeMismatchError(ValueError):
 
  Use case / message:
  "cannot supply both a tz and a timezone-naive dtype (i.e. datetime64[ns])"
+
+ Examples
+ --------
+ >>> from pandas.core.arrays import datetimes # doctest: +SKIP
+ >>> datetimes._validate_tz_from_dtype("datetime64[ns]", tz="UTC") # doctest: +SKIP
+ Traceback (most recent call last):
+ ...
+ TimezoneDtypeMismatchError: cannot supply both a tz and a timezone-naive dtype
+ (i.e. datetime64[ns])
  """