text: from django.contrib.staticfiles import finders
  
  from assetfiles import filters
  
  
  def find(output_path):
      """
      Search for filters that would output the given file.
  
      If one is found, search for one the filter's possible input paths for
      the given output path. If there's a match return a tuple of the found
      absolute path and the found filter. Otherwise return tuple of (None, None).
  
      Args:
          output_path: An absolute path to search for.
      Returns
          A tuple containing the absolute path to the input file and the filter
          instance that would filter it.
  
      >>> find('/path/to/filtered.file')
      ('/path/to/filterable.file', <SomeFilter instance>)
      >>> find('/path/to/unfiltered.file')
      (None, None)
      """
      filter = filters.find_by_output_path(output_path)
      if filter:
          for input_path in filter.derive_input_paths(output_path):
              full_input_path = finders.find(input_path)
              if full_input_path:
                  return full_input_path, filter
      return None, None
  