YouTubeにアップロードされている動画についているタグを別の動画のタグとしてコピーするためのPythonのテストプログラム。

copytag.py

#!/usr/bin/python

import httplib2
import os
import sys

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

# Youtubeからある動画についているタグを別の動画のタグとしてコピーするための
# Pythonのテストプログラム。
# URL: https://pandanote.info/?p=1454
#
# 使い方:
# copytag.py <コピー元の動画のID> <コピー先の動画のID>
#
# The CLIENT_SECRETS_FILE variable specifies the name of a file that contains
# the OAuth 2.0 information for this application, including its client_id and
# client_secret. You can acquire an OAuth 2.0 client ID and client secret from
# the Google Developers Console at
# https://console.developers.google.com/.
# Please ensure that you have enabled the YouTube Data API for your project.
# For more information about using OAuth2 to access the YouTube Data API, see:
#   https://developers.google.com/youtube/v3/guides/authentication
# For more information about the client_secrets.json file format, see:
#   https://developers.google.com/api-client-library/python/guide/aaa_client_secrets

if len(sys.argv) < 3:
  print('Usage: python3 {0:s} <コピー元の動画のID> <コピー先の動画のID>'.format(sys.argv[0]))
  quit()
source_id = sys.argv[1]
target_id = sys.argv[2]

del sys.argv[2]
del sys.argv[1]

CLIENT_SECRETS_FILE = "client_secret_copytag.json"

# This variable defines a message to display if the CLIENT_SECRETS_FILE is
# missing.
MISSING_CLIENT_SECRETS_MESSAGE = """
WARNING: Please configure OAuth 2.0

To make this sample run you will need to populate the client_secrets.json file
found at:

   %s

with information from the Developers Console
https://console.developers.google.com/

For more information about the client_secrets.json file format, please visit:
https://developers.google.com/api-client-library/python/guide/aaa_client_secrets
""" % os.path.abspath(os.path.join(os.path.dirname(__file__),
                                   CLIENT_SECRETS_FILE))

# This OAuth 2.0 access scope allows for read-only access to the authenticated
# user's account, but not other types of account access.
YOUTUBE_READ_WRITE_SCOPE = "https://www.googleapis.com/auth/youtube"
YOUTUBE_API_SERVICE_NAME = "youtube"
YOUTUBE_API_VERSION = "v3"

flow = flow_from_clientsecrets(CLIENT_SECRETS_FILE,
  message=MISSING_CLIENT_SECRETS_MESSAGE,
  scope=YOUTUBE_READ_WRITE_SCOPE)

storage = Storage("%s-oauth2.json" % sys.argv[0])
credentials = storage.get()

if credentials is None or credentials.invalid:
  flags = argparser.parse_args()
  credentials = run_flow(flow, storage, flags)

youtube = build(YOUTUBE_API_SERVICE_NAME, YOUTUBE_API_VERSION,
  http=credentials.authorize(httplib2.Http()))

# コピー元の動画のタグを抜き出して、コピー先の動画のタグとしてコピーします。
# まず、コピー元の動画からタグを抜き出す処理を定義します。

video_list_response = youtube.videos().list(
  id=source_id,
  part="snippet",
  maxResults=50
).execute()
tags = []

if not video_list_response["items"]:
  print("Video {0:s} was not found.".format(source_id))
  quit()

for video_list_item in video_list_response["items"]:
  if 'tags' in video_list_item["snippet"]:
    tags.extend(video_list_item["snippet"]["tags"])

video_list_response = youtube.videos().list(
  id=target_id,
  part="snippet",
  maxResults=50
).execute()

if not video_list_response["items"]:
  print("Video {0:s} was not found.".format(target_id))
  quit()
  
target_snippet = video_list_response["items"][0]["snippet"]

if "tags" not in target_snippet:
  target_snippet["tags"] = []
target_snippet["tags"].extend(tags)

insert_tag_request = youtube.videos().update(
  part='snippet',
  body=dict(
    snippet=target_snippet,
    id=target_id
  )
).execute()