def issubclass_(arg1, arg2):
try:<EOL><INDENT>return issubclass(arg1, arg2)<EOL><DEDENT>except TypeError:<EOL><INDENT>return False<EOL><DEDENT>
Determine if a class is a subclass of a second class.

`issubclass_` is equivalent to the Python built-in ``issubclass``,
except that it returns False instead of raising a TypeError is one
of the arguments is not a class.

Parameters
----------
arg1 : class
    Input class. True is returned if `arg1` is a subclass of `arg2`.
arg2 : class or tuple of classes.
    Input class. If a tuple of classes, True is returned if `arg1` is a
    subclass of any of the tuple elements.

Returns
-------
out : bool
    Whether `arg1` is a subclass of `arg2` or not.

See Also
--------
issubsctype, issubdtype, issctype

Examples
--------
>>> np.issubclass_(np.int32, np.int)
True
>>> np.issubclass_(np.int32, np.float)
False