DOC: fix EX02 errors in docstrings II (#51323)

Author: natmokval

ci/code_checks.sh

@@ -589,13 +589,10 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         pandas.Timestamp.fromtimestamp \
         pandas.api.types.infer_dtype \
         pandas.api.types.is_datetime64_any_dtype \
-        pandas.api.types.is_datetime64_dtype \
         pandas.api.types.is_datetime64_ns_dtype \
         pandas.api.types.is_datetime64tz_dtype \
         pandas.api.types.is_integer_dtype \
         pandas.api.types.is_interval_dtype \
-        pandas.api.types.is_numeric_dtype \
-        pandas.api.types.is_object_dtype \
         pandas.api.types.is_period_dtype \
         pandas.api.types.is_signed_integer_dtype \
         pandas.api.types.is_sparse \

pandas/core/dtypes/common.py

@@ -170,6 +170,7 @@ def is_object_dtype(arr_or_dtype) -> bool:
 
     Examples
     --------
+    >>> from pandas.api.types import is_object_dtype
     >>> is_object_dtype(object)
     True
     >>> is_object_dtype(int)
@@ -286,6 +287,7 @@ def is_datetime64_dtype(arr_or_dtype) -> bool:
 
     Examples
     --------
+    >>> from pandas.api.types import is_datetime64_dtype
     >>> is_datetime64_dtype(object)
     False
     >>> is_datetime64_dtype(np.datetime64)
@@ -1136,6 +1138,7 @@ def is_numeric_dtype(arr_or_dtype) -> bool:
 
     Examples
     --------
+    >>> from pandas.api.types import is_numeric_dtype
     >>> is_numeric_dtype(str)
     False
     >>> is_numeric_dtype(int)