code: def _evaluate_standard(op, op_str, a, b):
      """
      Standard evaluation.
      """
      if _TEST_MODE:
          _store_test_result(False)
      return op(a, b)
  
imports: from __future__ import annotations
  import operator
  import warnings
  import numpy
  from pandas._config import get_option
  from pandas._typing import FuncType
  from pandas.util._exceptions import find_stack_level
  from pandas.core.computation.check import NUMEXPR_INSTALLED
  from pandas.core.ops import roperator
label_desc: Use image node_id 3 for calling a global function with example usage: _evaluate_standard(op, op_str, a, b) and returns: op