title: How do I iterate over all the sheets in a google sheet using python 3?
body: <p>I'm trying to read the data from a Google spreadsheet using Python 3. All of my spreadsheets have multiple sheets.
  I need to get all the data from only the individual sheets that have "Log" in their title.</p>
  
  <p>I've found only examples of processing a spreadsheet with a single sheet called "Sheet1".
  Below is the code that I have that is able to print the names of the sheets whose title begins with "Log". However, I can't see how to read all the rows and do something useful with that data.</p>
  
  <pre><code>#! /usr/bin/env python3
  # -*- mode: python; coding: utf-8 -*-
  
  import os.path
  import pickle
  import re
  from googleapiclient.discovery import build
  from google_auth_oauthlib.flow import InstalledAppFlow
  from google.auth.transport.requests import Request
  
  # If modifying these scopes, delete the file token.pickle.
  SCOPES = ['https://www.googleapis.com/auth/spreadsheets.readonly']
  
  my_spreadsheets = ['sheet id goes here',  # add more spreadsheet ids after the code works for one SS.         
      ]
  
  def get_creds():
      creds = None
      # The file token.pickle stores the user's access and refresh tokens, and is
      # created automatically when the authorization flow completes for the first
      # time.
      if os.path.exists('token.pickle'):
          with open('token.pickle', 'rb') as token:
              creds = pickle.load(token)
      # If there are no (valid) credentials available, let the user log in.
      if not creds or not creds.valid:
          if creds and creds.expired and creds.refresh_token:
              creds.refresh(Request())
          else:
              flow = InstalledAppFlow.from_client_secrets_file(
                  'credentials.json', SCOPES)
              creds = flow.run_local_server(port=0)
          # Save the credentials for the next run
          with open('token.pickle', 'wb') as token:
              pickle.dump(creds, token)
  
      service = build('sheets', 'v4', credentials=creds)
      return service    
  
  def main():
      service = get_creds()
      # Iterate over the list of spreadsheets (spreadsheet Ids)
      log_RE = re.compile('^Log ')
      for spreadsheetId in my_spreadsheets:
          sheet_metadata = service.spreadsheets().get(spreadsheetId=spreadsheetId).execute()
          sheets = sheet_metadata.get('sheets', '')
          # Iterate over each of the sheets.
          for sheet in sheets:
            title = sheet.get("properties", {}).get("title", "Sheet1")
            if re.search(log_RE, title):
              sheet_id = sheet.get("properties", {}).get("sheetId", 0)
              print(title)
               # read all the rows in the sheet and process them here
               # process the data from all the rows and do something useful here.
  
  if __name__ == "__main__":
      main()
  </code></pre>