docstr: Return memory prefix.
docstr_tok: ["Return","memory","prefix","."]
code: def get_memory_prefix(
      cls, self_or_partner: str, model_type: str
  ) -> str:
      """
      Return memory prefix.
      """
      assert self_or_partner in ["self", "partner"]
      assert model_type in ["R2C2", "OPT"]
      self_prefix = (
          "your persona"
          if model_type == "R2C2"
          else cls.self_memory_prefix
      )
      partner_prefix = (
          "partner's persona"
          if model_type == "R2C2"
          else cls.partner_memory_prefix
      )
      if self_or_partner == "self":
          return self_prefix
      else:
          return partner_prefix
  
imports: import aiohttp
  import asyncio
  from enum import Enum
  import json
  import math
  from nltk.corpus import stopwords
  from nltk.tokenize import word_tokenize
  from nltk.stem import PorterStemmer
  import os
  import random
  import string
  import time
  from typing import List, Tuple, Optional, Dict, Any, Set, Union
  from parlai.agents.ir_baseline.ir_baseline import score_match, MaxPriorityQueue
  from parlai.core.dict import DictionaryAgent
  from parlai.core.message import Message
  from parlai.core.metrics import F1Metric
  from parlai.core.torch_generator_agent import PPLMetric
  import parlai.utils.logging
  import projects.bb3.constants
  import projects.bb3.prompts
  from projects.bb3.agents.module import Module
label_desc: Use image node_id 7 for calling the MemoryUtils obj's underlying member method code with example usage: obj.get_memory_prefix(cls, _or_partner, model_type) and returns: self_prefix, partner_prefix