code: import json
  
  from langchain.schema import OutputParserException
  
  
  def parse_json_markdown(json_string: str) -> dict:
      # Remove the triple backticks if present
      json_string = json_string.strip()
      start_index = json_string.find("```json")
      end_index = json_string.find("```", start_index + len("```json"))
  
      if start_index != -1 and end_index != -1:
          extracted_content = json_string[start_index + len("```json"):end_index].strip()
  
          # Parse the JSON string into a Python dictionary
          parsed = json.loads(extracted_content)
      elif start_index != -1 and end_index == -1 and json_string.endswith("``"):
          end_index = json_string.find("``", start_index + len("```json"))
          extracted_content = json_string[start_index + len("```json"):end_index].strip()
  
          # Parse the JSON string into a Python dictionary
          parsed = json.loads(extracted_content)
      elif json_string.startswith("{"):
          # Parse the JSON string into a Python dictionary
          parsed = json.loads(json_string)
      else:
          raise Exception("Could not find JSON block in the output.")
  
      return parsed
  
  
  def parse_and_check_json_markdown(text: str, expected_keys: list[str]) -> dict:
      try:
          json_obj = parse_json_markdown(text)
      except json.JSONDecodeError as e:
          raise OutputParserException(f"Got invalid JSON object. Error: {e}")
      for key in expected_keys:
          if key not in json_obj:
              raise OutputParserException(
                  f"Got invalid return object. Expected key `{key}` "
                  f"to be present, but got {json_obj}"
              )
      return json_obj
  
apis: langchain.schema.OutputParserException
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