from __future__ import unicode_literals
import yt_dlp
import sys

ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'mp3',
        'preferredquality': '0', # 0 = best quality
    }],
}

url = sys.argv[1]
print("Downloading youtube song " + url)

with yt_dlp.YoutubeDL(ydl_opts) as ydl:
    ydl.download([url])