text: from flask import request
  
  from superset import tables_cache
  
  
  def view_cache_key(*unused_args, **unused_kwargs):
      args_hash = hash(frozenset(request.args.items()))
      return 'view/{}/{}'.format(request.path, args_hash)
  
  
  def memoized_func(timeout=5 * 60, key=view_cache_key):
      """Use this decorator to cache functions that have predefined first arg.
  
      memoized_func uses simple_cache and stored the data in memory.
      Key is a callable function that takes function arguments and
      returns the caching key.
      """
      def wrap(f):
          if tables_cache:
              def wrapped_f(cls, *args, **kwargs):
                  cache_key = key(*args, **kwargs)
                  o = tables_cache.get(cache_key)
                  if not kwargs['force'] and o is not None:
                      return o
                  o = f(cls, *args, **kwargs)
                  tables_cache.set(cache_key, o, timeout=timeout)
                  return o
          else:
              # noop
              def wrapped_f(cls, *args, **kwargs):
                  return f(cls, *args, **kwargs)
          return wrapped_f
      return wrap
  