bools

    See Also
    --------
    str.isupper

    Examples
    --------
    >>> str = "GHC"
    >>> np.char.isupper(str)
    array(True)     
    >>> a = np.array(["hello", "HELLO", "Hello"])
    >>> np.char.isupper(a)
    array([False,  True, False]) 

    r,