old_contents: # coding: utf-8
  from common import *
  
  SECRET_KEY = 'secretkey_secretkey_secretkey_secretkey_secretkey_secretkey'
  
  
  # Email
  
  SUPPORT_EMAIL = ''
  NOREPLY_EMAIL = ''
  EMAIL_BACKEND = 'django.core.mail.backends.filebased.EmailBackend'
  EMAIL_FILE_PATH = 'tmp/email'
  
  # Database
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.postgresql_psycopg2',
          'NAME': os.environ['DB_NAME'],
          'USER': os.environ['DB_USER'],
          'HOST': '127.0.0.1',
          'PORT': '5432',
      },
  }
  
new_contents: from common import *
  
  
  SECRET_KEY = 'secretkey_secretkey_secretkey_secretkey_secretkey_secretkey'
  
  
  # Email
  
  SUPPORT_EMAIL = ''
  NOREPLY_EMAIL = ''
  EMAIL_BACKEND = 'django.core.mail.backends.filebased.EmailBackend'
  EMAIL_FILE_PATH = 'tmp/email'
  
  # Database
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.postgresql_psycopg2',
          'NAME': os.environ['DB_NAME'],
          'USER': os.environ['DB_USER'],
          'HOST': '127.0.0.1',
          'PORT': '5432',
      },
  }
  
subject: remove unnecessary lines