title: How to loop over nextPageToken using GoogleDrive's Python Quickstart
body: <p>My goal is to have a list of all of the items &amp; folders in everyone's Google Drive. I'm starting with trying to make sure the script works on my own. I have read cover-to-cover the <a href="https://developers.google.com/drive/v3/reference/files/list" rel="noreferrer">Drive REST API</a> documentation, and eventually found this code, which can also be found <a href="https://developers.google.com/drive/v3/web/quickstart/python" rel="noreferrer">here</a>.</p>
  
  <pre><code>from __future__ import print_function
  import httplib2
  import os
  import sys
  
  from apiclient import discovery
  from oauth2client import client
  from oauth2client import tools
  from oauth2client.file import Storage
  
  reload(sys)
  sys.setdefaultencoding('utf-8')
  
  try:
      import argparse
      flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
  except ImportError:
      flags = None
  
  # If modifying these scopes, delete your previously saved credentials
  # at ~/.credentials/drive-python-quickstart.json
  SCOPES = 'https://www.googleapis.com/auth/drive.metadata.readonly'
  CLIENT_SECRET_FILE = 'client_secret.json'
  APPLICATION_NAME = 'Drive API Python Quickstart'
  
  
  def get_credentials():
      """Gets valid user credentials from storage.
  
      If nothing has been stored, or if the stored credentials are invalid,
      the OAuth2 flow is completed to obtain the new credentials.
  
      Returns:
          Credentials, the obtained credential.
      """
      home_dir = os.path.expanduser('~')
      credential_dir = os.path.join(home_dir, '.credentials')
      if not os.path.exists(credential_dir):
          os.makedirs(credential_dir)
      credential_path = os.path.join(credential_dir,
                                     'drive-python-quickstart.json')
  
      store = Storage(credential_path)
      credentials = store.get()
      if not credentials or credentials.invalid:
          flow = client.flow_from_clientsecrets(CLIENT_SECRET_FILE, SCOPES)
          flow.user_agent = APPLICATION_NAME
          if flags:
              credentials = tools.run_flow(flow, store, flags)
          else: # Needed only for compatibility with Python 2.6
              credentials = tools.run(flow, store)
          print('Storing credentials to ' + credential_path)
      return credentials
  
  def main():
      """Shows basic usage of the Google Drive API.
  
      Creates a Google Drive API service object and outputs the names and IDs
      for up to 10 files.
      """
      credentials = get_credentials()
      http = credentials.authorize(httplib2.Http())
      service = discovery.build('drive', 'v3', http=http)
  
      results = service.files().list(
          pageSize=1000,fields="nextPageToken, files(mimeType, name)").execute()
      items = results.get('files', [])
      if not items:
          print('No files found.')
      else:
          print('Files:')
          for item in items:
              print('{0} ({1})'.format(item['name'], item['mimeType']))
  
  if __name__ == '__main__':
      main()
  </code></pre>
  
  <p>My problem is with the <code>nextPageToken</code>, and how to properly use it. The max <code>PageSize</code> is 1000, so I must loop over the <code>nextPageToken</code>, fetch it from the resulting JSON, put it back into the original loop (line 66?), to get another 1000 results. How do I do this?</p>