def is_complex_dtype(arr_or_dtype):
return _is_dtype_type(arr_or_dtype, classes(np.complexfloating))<EOL>
Check whether the provided array or dtype is of a complex dtype.

Parameters
----------
arr_or_dtype : array-like
    The array or dtype to check.

Returns
-------
boolean
    Whether or not the array or dtype is of a compex dtype.

Examples
--------
>>> is_complex_dtype(str)
False
>>> is_complex_dtype(int)
False
>>> is_complex_dtype(np.complex)
True
>>> is_complex_dtype(np.array(['a', 'b']))
False
>>> is_complex_dtype(pd.Series([1, 2]))
False
>>> is_complex_dtype(np.array([1 + 1j, 5]))
True