human
Solve the following python programming problem given the following code:
def test_1() : 
    def _callback(resp, ch = None) : 
        assert (resp == { 
            'message' : 'Success', 
            'payload' : { 
                'auths' : { 
                    'abcd' : { 
                        'r' : 1, 
                        'w' : 1, 
}, 
}, 
                'subscribe_key' : subkey, 
                'level' : 'user', 
                'channel' : 'abcd', 
                'ttl' : 1, 
}, 
}) 
def _error(response) : 
        assert False 
pubnub_pam.grant (channel = 'abcd', auth_key = 'abcd', read = True, write = True, ttl = 1, callback = _callback, error = _callback) 

    
    

    Fix the buggy line: pubnub_pam.grant (channel = 'abcd', auth_key = 'abcd', read = True, write = True, ttl = 1, callback = _callback, error = _callback)
assistant
#Here is Python code to fix the buggy line: pubnub_pam.

pubnub_pam.grant (channel = 'abcd', auth_key = 'abcd', read = True, write = True, ttl = 1, callback = _callback, error = def _error()