Short script to print all the titles in a YouTube Playlist

playlist_titles.py

import requests

playlist = "XXXXXXX" #Playlist ID from URL eg https://www.youtube.com/playlist?list=PL1Hr6VkuONaE4XM52ThiV-s3vXAUT0JCR
key = "XXXXXXXX" # Your YouTube API Key from https://console.developers.google.com/apis/credentials 
params = {"part" : "snippet", "maxResults" : 50, "playlistId": playlist, "key" : key}
url = "https://www.googleapis.com/youtube/v3/playlistItems"

items = []
r = requests.get(url, params=params)
rdata=r.json()
items.extend(rdata['items'])
while 'nextPageToken' in rdata:
     params['pageToken'] = rdata['nextPageToken']
     r = requests.get(url, params=params)
     rdata=r.json()
     items.extend(rdata['items'])
for i in items:
    print(i['snippet']['title'])