remove dumplicates

rmdup.py

#! /usr/bin/env python
if __name__ == "__main__":
    import os
    import sys
    import os.path

    path = sys.argv[1]
    if not os.path.exists(path):
        print("Error: file doesn't exists")
        exit(0)
    f1 = open(path, "r")
    f2 = open("%s.new" % path, "w") 
    for line in set(f1.readlines()):
        f2.write(line)
    f2.close()
    f1.close()