Prints and erases 5 random lines from a file

randomwords.py

# Reads out 5 random lines from a file and erases them

import os.path
import random

dictionary = open("/home/farhan/bin/words", "r")
words = set()
last_pos = dictionary.tell()
rand_words = list(dictionary)

for i in range(0, 5):
    word = random.choice(rand_words)
    words.add(word)
    print(word, end='')

dictionary.seek(last_pos)
new_dict = open("/home/farhan/bin/words.bak", "w")

for line in dictionary:
    if line not in words:
        new_dict.write(line)

os.remove("/home/farhan/bin/words")
os.rename("/home/farhan/bin/words.bak", "/home/farhan/bin/words")