code: def from_obj(cls, container, file_obj):
          
          # RFC 1123: Thu, 07 Jun 2007 18:57:07 GMT
          return cls(container,
                     name=file_obj.name,
                     size=file_obj.size,
                     content_type=file_obj.content_type,
                     last_modified=dt_from_header(file_obj.last_modified),
                     obj_type=cls.choose_type(file_obj.content_type))
docs: Create from regular info object.