How to embed socks5 proxy in python codes?

[hwypengsir]

youtube-dl --proxy socks5://127.0.0.1:1080 $link -o $dir can download video on youtube in bash shell.
With the following codes,we embedded youtube-dl in python codes.

from __future__ import unicode_literals
import youtube_dl
ydl_opts = {}
link = "some_youtube_url"
with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download([link])

How to embed socks5 proxy in python codes?

[dstftw]

https://github.com/rg3/youtube-dl#embedding-youtube-dl
https://github.com/rg3/youtube-dl/blob/master/youtube_dl/YoutubeDL.py#L211