python_async_ex1.py

import requests
import aiohttp
import asyncio
import time

from key import key

start_time = time.time()
print("getting first contentDetails")
channel_id = 'UC-QDfvrRIDB6F0bIO4I4HkQ'
url = f'https://www.googleapis.com/youtube/v3/channels?id={channel_id}&key={key}&part=contentDetails'
r = requests.get(url)
print(r.json())
results = r.json()['items']
print(results)

playlist_id = results[0]['contentDetails']['relatedPlaylists']['uploads']
print('playlist_id is ' + playlist_id)
url = f'https://www.googleapis.com/youtube/v3/playlistItems?playlistId={playlist_id}&key={key}&part=contentDetails&maxResults=50'

video_ids = []
while True:
    r = requests.get(url)
    results = r.json()
    if 'nextPageToken' in results:
        nextPageToken = results['nextPageToken']
    else:
        nextPageToken = None

    if 'items' in results:
        for item in results['items']:
            videoId = item['contentDetails']['videoId']
            video_ids.append(videoId)

    if nextPageToken:
        url = f'https://www.googleapis.com/youtube/v3/playlistItems?playlistId={playlist_id}&pageToken={nextPageToken}&key={key}&part=contentDetails&maxResults=50'
        
    else:
        break
print('video_ids are '+ str(video_ids))
print('video_ids length is '+ str(len(video_ids)))
view_counts = []
# for video_id in video_ids:
#        url = f'https://www.googleapis.com/youtube/v3/videos?id={video_id}&key={key}&part=statistics'
#        r = requests.get(url)
#        results = r.json()['items']
#        viewCount = results[0]['statistics']['viewCount']
#        view_counts.append(int(viewCount))

# print('Number of videos:',len(view_counts))
# print('Average number of views:',sum(view_counts)/len(view_counts))


async def main():
    async with aiohttp.ClientSession() as session:
        tasks = []
        for video_id in video_ids:
            task = asyncio.ensure_future(get_video_data(session,video_id))
            tasks.append(task)

        view_counts = await asyncio.gather(*tasks)
    print('Number of videos:',len(view_counts))
    print('Average number of views:',sum(view_counts)/len(view_counts))

async def get_video_data(session, video_id):
    url = f'https://www.googleapis.com/youtube/v3/videos?id={video_id}&key={key}&part=statistics'
    async with session.get(url) as response:

        result_data = await response.json() 
        results = result_data['items']
        viewCount = results[0]['statistics']['viewCount']
        return int(viewCount)

asyncio.run(main())

print("--- %s seconds ---" % (time.time() - start_time))