old_contents: import os
  
  host_envs = {
      'prod': 'http://mech-ai.appspot.com',
      'dev': 'http://127.0.0.1:8080',
  }
  
  environment = os.getenv('ENV', 'dev')
  host = host_env.get('environment')
  
  username = os.getenv('USER')
  access_token = os.getenv('TOKEN')
  
  try:
      from local_config import *  # Override with local settings if exists
  except ImportError:
      pass
  
  
new_contents: import os
  
  host_env = {
      'prod': 'http://mech-ai.appspot.com',
      'dev': 'http://127.0.0.1:8080',
  }
  
  environment = os.getenv('ENV', 'dev')
  host = host_env.get(environment)
  
  username = os.getenv('USER')
  access_token = os.getenv('TOKEN')
  
  try:
      from local_config import *  # Override with local settings if exists
  except ImportError:
      pass
  
  
subject: Fix bugs in config.py