Grab all urls from saved html file with python and beautifulsoup

1. Prepare html file: in Chrome open youtube.com, press ctrl+s and save the page under the name youtube.html
2. Install pip dependencies:

   pip install bs4

3. Create a grab-links.py file with following contents:

   from bs4 import BeautifulSoup
   import argparse
   
   def get_args():
       parser = argparse.ArgumentParser(
           description=__doc__,
           formatter_class=argparse.RawDescriptionHelpFormatter
       )
       parser.add_argument(
           'file',
           type=str,
           nargs='+',
           help='saved html file to get urls from'
       )
       return parser.parse_args()
   
   def main():
       args = get_args()
   
       print(args.file[0])
       f = open(args.file[0],"r") 
   
       soup = BeautifulSoup(f.read(), 'lxml')
       f.close()
   
       for l in soup.findAll('a'):
         print(l.get('href'))
   
   if __name__ == "__main__":
       main()
   

4. Grab the links from saved file using new-created script:

   python3 grab-links.py youtube.html