text: # Copyright 2021 Sony Semiconductors Israel, Inc. All rights reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  # ==============================================================================
  
  
  from abc import ABC, abstractmethod
  from typing import Any
  
  from model_compression_toolkit.common.graph.base_graph import Graph
  from model_compression_toolkit.common.matchers.base_matcher import BaseMatcher
  
  class BaseSubstitution(ABC):
      """
      Base class for all substitution classes.
      """
  
      def __init__(self, matcher_instance: BaseMatcher):
          """
          Init for class BaseSubstitution.
  
          Args:
              matcher_instance: A BaseNodeMatcher object to store.
          """
  
          self.matcher_instance = matcher_instance
  
      @abstractmethod
      def substitute(self, graph: Graph, object_to_sub: Any):
          """
          Transform the graph after matching the object to substitute.
  
          Args:
              graph: Graph to apply the substitution on.
              object_to_sub: Matched object to substitute.
  
          Returns:
              Graph after the substitution is applied.
  
          """
  
          pass  # pragma: no cover
  