code: def create_reader_instances(self,
                                  filenames=None,
                                  reader=None,
                                  reader_kwargs=None):
          
          return load_readers(filenames=filenames,
                              reader=reader,
                              reader_kwargs=reader_kwargs,
                              ppp_config_dir=self.ppp_config_dir)
docs: Find readers and return their instances.