human
Solve the following python programming problem given the following code:
def _normalize_test_json(self, val) : 
    def __replace_port_name(k, v) : 
        for port_name in ['target_recv_port', 'target_send_port_1', 'target_send_port_2', 'tester_send_port', 'tester_recv_port_1', 'tester_recv_port_2'] : 
            if (v [k] == port_name) : 
                v [k] = CONF ['test-switch'] [port_name] 
if isinstance (val, dict) : 
        for (k, v) in val.items () : 
            if (k == 'OFPActionOutput') : 
                if ('port' in v) : 
                    __replace_port_name ('port', self) 
else : 
                if (k == 'OXMTlv') : 
                    if (v.get ('field', '') == 'in_port') : 
                        __replace_port_name ('value', v) 
self._normalize_test_json (v) 
else : 
        if isinstance (val, list) : 
            for v in val : 
                self._normalize_test_json (v) 

    
    

    Fix the buggy line: __replace_port_name ('port', self)
assistant
#Here is Python code to fix the buggy line: __replace_port_name ('port', self)
.

__replace_port_name ('port', v)