code: def describe_file_set(modules):
      
      descriptor = FileSet()
      file_descriptors = []
      for module in modules:
          file_descriptors.append(describe_file(module))
  
      if file_descriptors:
          descriptor.files = file_descriptors
  
      return descriptor
docs: Build a file set from a specified Python modules.
  
      Args:
        modules: Iterable of Python module to describe.
  
      Returns:
        Initialized FileSet instance describing the modules.