extract youtube audio.py

from __future__ import unicode_literals
import youtube_dl

class MyLogger(object):
    def debug(self, msg):
        pass
    def warning(self, msg):
        pass
    def error(self, msg):
        print(msg)

def my_hook(d):
    if d['status'] == 'finished':
        print('Done downloading, now converting to audio ...')

options = {
    'format': 'bestaudio/best',
    'extractaudio': True,
    'outtmpl': u'%(id)s.%(ext)s',
    'nocheckcertificate': True,
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'wav',
        'preferredquality': '192',
        }],
    'logger': MyLogger(),
    'progress_hooks': [my_hook],
}

with youtube_dl.YoutubeDL(options) as ydl:
    ydl.download(['https://www.youtube.com/watch?v=w8rg9c4pUrg'])