Problem with python connecting to FTP server

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Python

FTP

I have the android FTPserver app running on my android mobile under Tethering mode. I connected to my mobiles network from my laptop and tried to connect to mobile via FTP to access few files. I wrote a python code that uses the ftp connection to transfer files but I am unable to perform simple connection.

I keep getting this error
in windows:

server.gaierror: [Errno 11004] getadderinfo failed 

in linux:

socket.gaierror: [Errno -2] Name or service not known

I searched so many places but never found a proper solution. All I could findout was people suggesting to check the firewall. I checked the firewall settings and everything and still I get the problem.

When I use a client software (filezilla) it does get connected.

I am a newbie to python could someone possibly tell me where I am going wrong?

here is my simple connecting code:

import os
from ftplib import FTP

ftp = FTP("192.168.43.1,5002")
ftp.login("usrid","pwd")

I am unable to connect to a general ftp test site, Here is the code for that:

from ftplib import FTP

ftp = FTP('ftp.cwi.nl')
ftp.login("anonymous","anonymous@")
ftp.retrlines('LIST')