code: def is_extension_array_dtype(arr_or_dtype) -> bool:
      """
      Check if an object is a pandas extension array type.
  
      See the :ref:`Use Guide <extending.extension-types>` for more.
  
      Parameters
      ----------
      arr_or_dtype : object
          For array-like input, the ``.dtype`` attribute will
          be extracted.
  
      Returns
      -------
      bool
          Whether the `arr_or_dtype` is an extension array type.
  
      Notes
      -----
      This checks whether an object implements the pandas extension
      array interface. In pandas, this includes:
  
      * Categorical
      * Sparse
      * Interval
      * Period
      * DatetimeArray
      * TimedeltaArray
  
      Third-party libraries may implement arrays or types satisfying
      this interface as well.
  
      Examples
      --------
      >>> from pandas.api.types import is_extension_array_dtype
      >>> arr = pd.Categorical(['a', 'b'])
      >>> is_extension_array_dtype(arr)
      True
      >>> is_extension_array_dtype(arr.dtype)
      True
  
      >>> arr = np.array(['a', 'b'])
      >>> is_extension_array_dtype(arr.dtype)
      False
      """
      dtype = getattr(arr_or_dtype, "dtype", arr_or_dtype)
      if isinstance(dtype, ExtensionDtype):
          return True
      elif isinstance(dtype, np.dtype):
          return False
      else:
          return registry.find(dtype) is not None
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING, Any, Callable
  import warnings
  import numpy
  from pandas._libs import Interval, Period, algos, lib
  from pandas._libs.tslibs import conversion
  from pandas.util._exceptions import find_stack_level
  from pandas.core.dtypes.base import _registry
  from pandas.core.dtypes.dtypes import CategoricalDtype, DatetimeTZDtype, ExtensionDtype, IntervalDtype, PeriodDtype, SparseDtype
  from pandas.core.dtypes.generic import ABCIndex
  from pandas.core.dtypes.inference import is_array_like, is_bool, is_complex, is_dataclass, is_decimal, is_dict_like, is_file_like, is_float, is_hashable, is_integer, is_interval, is_iterator, is_list_like, is_named_tuple, is_nested_list_like, is_number, is_re, is_re_compilable, is_scalar, is_sequence
label_desc: Use image node_id 31 for calling a global function with example usage: is_extension_array_dtype(arr_or_dtype) and returns: True, False, unknown