class_docstr: Class for connecting models and data operations with json files with
  its descriptions and metadata
code: def assign_repo(cls, operation_type: str, repo_file: str):
      if operation_type not in cls.__repository_dict__:
          raise Warning(
              f"The {operation_type} is not supported. The model type will be set"
          )
  
      repo_path = create_repository_path(repo_file)
      if repo_file not in cls.__initialized_repositories__.keys():
          cls.__initialized_repositories__[
              repo_file
          ] = cls._initialise_repo(repo_path)
      cls.__repository_dict__[operation_type]["file"] = repo_file
      cls.__repository_dict__[operation_type][
          "initialized_repo"
      ] = cls.__initialized_repositories__[repo_file]
  
      return OperationTypesRepository(operation_type)
  
imports: import json
  import os
  from collections import defaultdict
  from dataclasses import dataclass
  from typing import Dict, List, Optional, TYPE_CHECKING, Union
  import numpy
  from golem.core.log import default_log
  from golem.utilities.data_structures import ensure_wrapped_in_sequence
  from fedot.core.constants import AUTO_PRESET_NAME, BEST_QUALITY_PRESET_NAME
  from fedot.core.repository.dataset_types import DataTypesEnum
  from fedot.core.repository.json_evaluation import import_enums_from_str, import_strategy_from_str, read_field
  from fedot.core.repository.tasks import Task, TaskTypesEnum
label_desc: Use image node_id 5 for calling the OperationTypesRepository obj's underlying member method code with example usage: obj.assign_repo(cls, operation_type, repo_file) and returns: OperationTypesRepository