numerictypes.py 文件源码

def issubsctype(arg1, arg2):
    """
    Determine if the first argument is a subclass of the second argument.

    Parameters
    ----------
    arg1, arg2 : dtype or dtype specifier
        Data-types.

    Returns
    -------
    out : bool
        The result.

    See Also
    --------
    issctype, issubdtype,obj2sctype

    Examples
    --------
    >>> np.issubsctype('S8', str)
    True
    >>> np.issubsctype(np.array([1]), np.int)
    True
    >>> np.issubsctype(np.array([1]), np.float)
    False

    """
    return issubclass(obj2sctype(arg1), obj2sctype(arg2))