I have a simple socket class: **MySocketLib.py** ..

```
import socket

class socklib():
    def create_tcp_serversocket(self,port):
        serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        serversocket.bind((socket.gethostname(), port))
        serversocket.listen(5) 
        return serversocket

    def send_msg(self, sock, msg, msglen):
         ... blah blah ...  

    def recv_msg(self, sock, msglen):
         ... blah blah .... 

```

My main file is **Server.py** as follows: 

```
import MySocketLib

class serverclass(): 

    def __init__(self,port):
        self.servsock = 0
        self.port = port

    def run(self):
        self.servsock = self.create_tcp_serversocket(self.port)
        (clientsock, address) = self.servsock.accept() # ERROR: 'SELF' not defined
        ... blah blah ... 

#############################
###   Main startup code

if __name__ == '__main__':
    server = serverclass(2000) # server is on port 2000
    server.run()

```

I keep getting the below error: 

```
File "D:\CodeLearn\Server.py", line 14, in serverclass
(clientsock, address) = self.servsock.accept()
NameError: name 'self' is not defined

```

I can't seem to get a handle on the concept of "self". Some times, it seems to be needed and sometimes not. Why would i need to define 'self' here when it is a python keyword? 

---

Thanks everyone ... it was indeed the tabs and spacing issues. I use eclipse and in preferences I have set "Editor" preferences to use spaces when tabbing.