old_contents: 
  DB = MySQLDatabase('codatadb',
                     user='heteroskedastic1',
                     host='heteroskedastic1.mysql.pythonanywhere-services.com')
new_contents: from peewee import *
  DB = MySQLDatabase('codatadb',
                     user='heteroskedastic1',
                     host='heteroskedastic1.mysql.pythonanywhere-services.com')
subject: add import