Function isdigit

numpy/core/defchararray.py:872–903

Returns true for each element if all characters in the string are digits and there is at least one character, false otherwise. Calls `str.isdigit` element-wise. For 8-bit strings, this method is locale-dependent. Parameters ---------- a : array_like of str or unicode

(a)

@array_function_dispatch(_unary_op_dispatcher)
def isdigit(a):
    """
    Returns true for each element if all characters in the string are
    digits and there is at least one character, false otherwise.

    Calls `str.isdigit` element-wise.

    For 8-bit strings, this method is locale-dependent.

    Parameters
    ----------
    a : array_like of str or unicode

    Returns
    -------
    out : ndarray
        Output array of bools

    See Also
    --------
    str.isdigit

    Examples
    --------
    >>> a = np.array(['a', 'b', '0'])
    >>> np.char.isdigit(a)
    array([False, False,  True])
    >>> a = np.array([['a', 'b', '0'], ['c', '1', '2']])
    >>> np.char.isdigit(a)
    array([[False, False,  True], [False,  True,  True]])
    """
    return _vec_string(a, bool_, 'isdigit')


@array_function_dispatch(_unary_op_dispatcher)