old_contents: from django.core.cache import cache
  from django.utils import crypto
  
  
  GENERATION_KEY_NAME = 'metric:generation'
  
  
  def generation_key(timeout=60 * 60 * 365):
      """
      A random key to be used in cache calls that allows
      invalidating all values created with it. Use it with
      the version parameter of cache.get/set.
      """
      generation = cache.get(GENERATION_KEY_NAME)
      if generation is None:
          generation = crypto.get_random_string(length=12)
          cache.set(GENERATION_KEY_NAME, generation, timeout)
      return generation
  
  
  def reset_generation_key():
      """
      Invalidate all cache entries created with the generation key.
      """
      cache.delete(GENERATION_KEY_NAME)
  
new_contents: from django.core.cache import cache
  from django.utils import crypto
  
  
  GENERATION_KEY_NAME = 'metric:generation'
  
  
  def generation_key(timeout=60 * 60 * 24 * 365):
      """
      A random key to be used in cache calls that allows
      invalidating all values created with it. Use it with
      the version parameter of cache.get/set.
      """
      generation = cache.get(GENERATION_KEY_NAME)
      if generation is None:
          generation = crypto.get_random_string(length=12)
          cache.set(GENERATION_KEY_NAME, generation, timeout)
      return generation
  
  
  def reset_generation_key():
      """
      Invalidate all cache entries created with the generation key.
      """
      cache.delete(GENERATION_KEY_NAME)
  
subject: Fix typo in timeout of generation cache key.