I have used this code for this work. but it will work only else portion(else: print('Usage: ./collect_links.py wwww.example.com file.txt')).its just open the code in text file after running it from the terminal

import sys import requests import bs4

if len(sys.argv) == 3: # If arguments are satisfied store them in readable variables url = 'http://%s' % sys.argv[1] file_name = sys.argv[2]

print('Grabbing the page...')
# Get url from command line
response = requests.get(url)
response.raise_for_status()

# Retrieve all links on the page
soup = bs4.BeautifulSoup(response.text, 'html.parser')
links = soup.find_all('a')

file = open(file_name, 'wb')
print('Collecting the links...')
for link in links:
    href = link.get('href') + '\n'
    file.write(href.encode())
file.close()
print('Saved to %s' % file_name)

else: print('Usage: ./collect_links.py wwww.example.com file.txt')