yt download.py

# importing packages
# IF errors replace line 30 in cipher.py as follows
#  var_regex = re.compile(r"^\$*\w+\W")
import sys
import os
ytpath=r'https://www.youtube.com/watch?v=2SCOYFkvXWQ'
!{sys.executable} -m pip install pytube 
import pytube
from pytube import YouTube
  
# url input from user
yt = YouTube(
    str(input("Enter the URL of the video you want to download: \n>> ")))
  
# extract only audio
video = yt.streams.filter(only_audio=True).first()
  
# check for destination to save file
print("Enter the destination (leave blank for current directory)")
destination = str(input(">> ")) or '.'
  
# download the file
out_file = video.download(output_path=destination)
  
# save the file
base, ext = os.path.splitext(out_file)
new_file = base + '.mp3'
os.rename(out_file, new_file)
  
# result of success
print(yt.title + " has been successfully downloaded.")