human
Solve the following python programming problem given the following code:
@ classmethod 
def register_self(cls, **kwargs) : 
    registry = get_module_registry () 
    def resolve_type(t) : 
        if (type (t) == tuple) : 
            return registry.get_descriptor_by_name (* t).module 
else : 
            if (type (t) == type) : 
                return t 
else : 
                assert False, ('Unknown type ' + str (type (t))) 
registry.add_module (types, ** kwargs) 
    try : 
        ips = cls.input_ports 
except AttributeError : 
        pass 
else : 
        for (port_name, types) in ips : 
            registry.add_input_port (cls, port_name, list ((resolve_type (t) for t in types))) 
try : 
        ops = cls.output_ports 
except AttributeError : 
        pass 
else : 
        for (port_name, types) in ops : 
            registry.add_output_port (cls, port_name, list ((resolve_type (t) for t in types))) 

    
    

    Fix the buggy line: registry.add_module (types, ** kwargs)
assistant
#Here is Python program to fix the buggy line: registry.

registry.add_module (cls, ** kwargs)