How to check user has put in correct number of arguments on command line in python-CodePudding

I'm trying to check that the user has entered two arguments on the command line - the iface name and passive for a type of scan - I thought the script would just exit if the wrong arguments entered but it still prints out the error message no matter how many arguments entered - what am I missing ?

import sys
import os

def main():
    if len(sys.argv) != 2:
         print("not enough arguments")

         sys.exit(1)
    
    else:
        args = sys.argv

        if("-i" in args):
            i = args.index("-i") 1
            iface = args[i]
            print(iface)

        if("-p" in args):
            passive = args.index("-p") 1
            passive = args[passive]
            print(passive)
 
main()

CodePudding user response：

sys.argv also returns the name of the python file. Try running:

print(sys.argv)