human
Solve the following python programming problem given the following code:
def _doLogin(self) : 
    idParams = { 
        
} 
    idParams ['host'] = self._hostEntry.get_text () 
    idParams ['port'] = self._portEntry.get_text () 
    idParams ['identityName'] = self._identityNameEntry.get_text () 
    idParams ['password'] = self._passwordEntry.get_text () 
    try : 
        idParams ['port'] = int (idParams ['port']) 
except ValueError : 
        pass 
f = pb.PBClientFactory () 
    from twisted.internet import reactor 
    reactor.connectTCP (idParams ['host'], idParams ['port'], f) 
    creds = UsernamePassword (idParams ['identityName'], idParams ['password']) 
    d = f.login (creds, d.client) 
    def _timeoutLogin() : 
        self._timeoutID = None 
        d.errback (failure.Failure (defer.TimeoutError ('Login timed out.'))) 
self._timeoutID = reactor.callLater (30, _timeoutLogin) 
    d.addCallbacks (self._cbGotPerspective, self._ebFailedLogin) 
    self.statusMsg ('Contacting server...') 

    
    

    Fix the buggy line: d = f.login (creds, d.client)
assistant
#Here is Python program to fix the buggy line: d = f.

d = f.login (creds, self.client)