How to run it?

[Breakzot]

How to run it?
python list.py

Traceback (most recent call last):
File "list.py", line 146, in
a = IPReverse()
File "list.py", line 20, in init
self.ProxyLoc = input("Proxyfile?\n")
File "", line 1, in
NameError: name 'n' is not defined