Downloading subtitles using python script

[aringhosh]

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I am trying to write a python program which can download the automatic subtitle of a given youtube video. However, it is not downloading anything. Probably I am messing up with the options. Can someone please show me the correct way to do this? I have attached my python file.

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


ydl_opts = {
    'simulate': True,
    'logger': MyLogger(),
    'progress_hooks': [my_hook],
    'subtitleslangs': 'en',
    'writeautomaticsub': True,
}


with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['https://www.youtube.com/watch?v=Ye8mB6VsUHw'])

[dstftw]

-s, --simulate Do not download the video and do not write
anything to disk

[aringhosh]

Thank you @dstftw , I get it that --simulate won't work.
But what combination of options will work for the above case? This still don't work, My objective is to download the subtitle and I don't need the video

ydl_opts = {
    # 'simulate': True,
    'skip_download': True,
    'logger': MyLogger(),
    'progress_hooks': [my_hook],
    'subtitleslangs': 'en',
    'writeautomaticsub': True,
}

[dstftw]

Provide verbose logs as clearly stated in the issue template.

[aringhosh]

Here's the verbose I am getting @dstftw

ydl_opts = {
    'verbose': True,
    'skip_download': True,
    'logger': MyLogger(),
    'progress_hooks': [my_hook],
    'subtitleslangs': 'en',
    'writeautomaticsub': True,
}

[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.02.22
[debug] Python version 3.6.2 (CPython) - Darwin-17.4.0-x86_64-i386-64bit
[debug] exe versions: none
[debug] Proxy map: {}