A sample Python script to download audio from YouTube URL

downloadSongFromURL.py

import pafy
import time

sample_URLs = ['wdPAIXBmcF0', 'FiiA9OSm5lc']

for an_elt in sample_URLs:
    URL = an_elt.strip()
    try:
        video = pafy.new(URL)
        # Check that the duration of the video is less than 10 minutes
        duration =  video.duration.split(':')
        if int(duration[0]) == 0 and int(duration[1]) <= 10:
            bestaudio = video.getbestaudio()
            Title = str(video.title)
            bestaudio.download(filepath = './')
        else:
            continue
    except:
        print "Failed!"
        time.sleep(21)
        continue