docstr: Set self[key] to value.
docstr_tok: ["Set","self","[","key","]","to","value","."]
code: def __setitem__(self, k: InstKT, v: InstVT) -> None:
      """Set self[key] to value."""
      raise NotImplementedError(
          "Subclass of InstrumentStorage must implement `__setitem__` method"
      )
  
imports: import re
  from typing import Iterable, overload, Tuple, List, Text, Union, Dict
  import numpy
  import pandas
  from qlib.log import get_module_logger
label_desc: Use image node_id 5 for calling the InstrumentStorage obj's underlying member method code with example usage: obj.__setitem__(k, v) without return types