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#!/usr/bin/python

# Usage example:

# python channel_localizations.py --action='<action>' --channel_id='<channel_id>' --default_language='<default_language>' --language='<language>' --title='<title>' --description='<description>'

import argparse

import os

import re

import google.oauth2.credentials

import google_auth_oauthlib.flow

from googleapiclient.discovery import build

from googleapiclient.errors import HttpError

from google_auth_oauthlib.flow import InstalledAppFlow

# 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 Cloud Console }} at

# {{ https://cloud.google.com/console }}.

# 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

CLIENT_SECRETS_FILE = 'client_secret.json'

# This OAuth 2.0 access scope allows for full read/write access to the

# authenticated user's account.

SCOPES = ['https://www.googleapis.com/auth/youtube']

API_SERVICE_NAME = 'youtube'

API_VERSION = 'v3'

# Authorize the request and store authorization credentials.

def get_authenticated_service():

flow = InstalledAppFlow.from_client_secrets_file(CLIENT_SECRETS_FILE, SCOPES)

credentials = flow.run_console()

return build(API_SERVICE_NAME, API_VERSION, credentials = credentials)

# Call the API's channels.update method to update an existing channel's default language,

# and localized description in a specific language.

def set_channel_localization(youtube, args):

results = youtube.channels().list(

part='localizations',

id=args.channel_id

).execute()

channel = results['items'][0]

# Ensure that a value is set for the resource's snippet.defaultLanguage property.

# To set the snippet.defaultLanguage property for a channel resource,

# you actually need to update the brandingSettings.channel.defaultLanguage property.

if 'localizations' not in channel:

channel['localizations'] = {}

if args.title and args.description and args.language:

channel['localizations'][args.language] = {

'title': args.title,

'description': args.description

}

# Set the default language if it is provided as an argument

if args.default_language:

results = youtube.channels().list(

part='brandingSettings',

id=args.channel_id

).execute()

branding_settings_channel = results['items'][0]

# This property must be removed when changing the default language

# or set to the original channel title to avoid a

# channelTitleUpdateForbidden error.

del branding_settings_channel['brandingSettings']['channel']['title']

branding_settings_channel['brandingSettings']['channel']['defaultLanguage'] = (

args.default_language)

language_result = youtube.channels().update(

part='brandingSettings',

body=branding_settings_channel

).execute()

updated_default_language = (

language_result['brandingSettings']['channel']['defaultLanguage'])

print 'Updated language to %s' % updated_default_language

update_result = youtube.channels().update(

part='localizations',

body=channel

).execute()

localization = update_result['localizations'][args.language]

print ('Updated channel \'%s\' localized title and description to '

'\'%s\' and \'%s\' in language \'%s\'' %

(args.channel_id, localization['title'], localization['description'], args.language))

# Call the API's channels.list method to retrieve an existing channel localization.

# If the localized text is not available in the requested language,

# this method will return text in the default language.

def get_channel_localization(youtube, channel_id, language):

results = youtube.channels().list(

part='snippet',

id=channel_id,

hl=language

).execute()

# The localized object contains localized text if the hl parameter specified

# a language for which localized text is available. Otherwise, the localized

# object will contain metadata in the default language.

localized = results['items'][0]['snippet']['localized']

print 'Channel description is \'%s\' in language \'%s\'' % (localized['description'], language)

# Call the API's channels.list method to list the existing channel localizations.

def list_channel_localizations(youtube, channel_id):

results = youtube.channels().list(

part='snippet,localizations',

id=channel_id

).execute()

if 'localizations' in results['items'][0]:

localizations = results['items'][0]['localizations']

for language, localization in localizations.iteritems():

print 'Channel description is \'%s\' in language \'%s\'' % (localization['description'], language)

else:

print 'There aren\'t any localizations for this channel yet.'

if __name__ == '__main__':

parser = argparse.ArgumentParser()

# The 'action' option specifies the action to be processed.

parser.add_argument('--action', help='Action')

# The 'channel_id' option specifies the ID of the selected YouTube channel.

parser.add_argument('--channel_id',

help='ID for channel for which the localization will be applied.')

# The 'default_language' option specifies the language of the channel's default metadata.

parser.add_argument('--default_language', help='Default language of the channel to update.',

default=None)

# The 'language' option specifies the language of the localization that is being processed.

parser.add_argument('--language', help='Language of the localization.', default='de')

# The 'title' option specifies the localized title of the chanel to be set.

parser.add_argument('--title', help='Localized title of the channel to be set.',

default='Localized title')

# The 'description' option specifies the localized description of the chanel to be set.

parser.add_argument('--description', help='Localized description of the channel to be set.',

default='Localized description')

args = parser.parse_args()

if not args.channel_id:

exit('Please specify channel id using the --channel_id= parameter.')

youtube = get_authenticated_service()

try:

if args.action == 'set':

set_channel_localization(youtube, args)

elif args.action == 'get':

get_channel_localization(youtube, args.channel_id, args.language)

elif args.action == 'list':

list_channel_localizations(youtube, args.channel_id)

else:

exit('Please specify a valid action using the --action= parameter.')

except HttpError, e:

print 'An HTTP error %d occurred:\n%s' % (e.resp.status, e.content)

else:

print 'Set or retrieved localized metadata for a channel.'

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