[Python] getting an error when trying to use Google API with Client Secrets File and OAuth 2.0

I just can't understand what am I doing wrong when using YouTube API, and specifically the client secrets file.

I've created a client secrets file by following the steps on the google developers website —

1. go to https://console.developers.google.com/
2. go to API Manager section
3. go to Credentials tab
4. Add Credentials button -> OAuth 2.0 Client ID
5. Application type -> Web Application
6. The client secret file is ready to be downloaded now, so I download it and place it on my pc

Now, I try to run this basic code snippet, presented on the google developers website https://developers.google.com/youtube/v3/code_samples/python#rate__like__a_video

import httplib2
import os
import sys

from apiclient.discovery import build
from apiclient.errors import HttpError
from oauth2client.client import flow_from_clientsecrets
from oauth2client.file import Storage
from oauth2client.tools import argparser, run_flow


CLIENT_SECRETS_FILE = "C:\\Python27\\Projects\\YoutubeBot_client_secrets.json"

# This variable defines a message to display if the CLIENT_SECRETS_FILE is
# missing.
MISSING_CLIENT_SECRETS_MESSAGE = "something went wrong."

# This OAuth 2.0 access scope allows for full read/write access to the
# authenticated user's account.
YOUTUBE_READ_WRITE_SCOPE = "https://www.googleapis.com/auth/youtube"
YOUTUBE_API_SERVICE_NAME = "youtube"
YOUTUBE_API_VERSION = "v3"

def get_authenticated_service(args):
flow = flow_from_clientsecrets(CLIENT_SECRETS_FILE,
scope=YOUTUBE_READ_WRITE_SCOPE,
message=MISSING_CLIENT_SECRETS_MESSAGE)
storage = Storage("%s-oauth2.json" % sys.argv[0])
credentials = storage.get()
if credentials is None or credentials.invalid:
credentials = run_flow(flow, storage, args)
return build(YOUTUBE_API_SERVICE_NAME, YOUTUBE_API_VERSION,
http=credentials.authorize(httplib2.Http()))

# Add the video rating. This code sets the rating to "like," but you could
# also support an additional option that supports values of "like" and
# "dislike."
def like_video(youtube, video_id):
youtube.videos().rate(
id=video_id,
rating="like"
).execute()

if __name__ == "__main__":
argparser.add_argument("--videoid", default="L-oNKK1CrnU",
help="ID of video to like.")
args = argparser.parse_args()

youtube = get_authenticated_service(args)
try:
like_video(youtube, "8hj6BK8WGtA" )
except HttpError, e:
print "An HTTP error %d occurred:\n%s" % (e.resp.status, e.content)
else:
print "%s has been liked." % args.videoid


And I just receive an error (the MISSING_CLIENT_SECRETS_MESSAGE error) regarding my client secret file:

SystemExit: something went wrong.


And that's the root cause -

---> 29 message=MISSING_CLIENT_SECRETS_MESSAGE)

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