code: def _bisect(
      f: Callable[[float], float], a: float, b: float, c: float
  ) -> float:
      if f(a) > c:
          a, b = b, a
      # TODO(amylase): Justify this constant
      for _ in range(100):
          m = (a + b) / 2
          if f(m) < c:
              a = m
          else:
              b = m
      return m
  
imports: import functools
  import math
  import sys
  from typing import Callable
  from typing import Optional
  from typing import Union
  import numpy
  from optuna.samplers._tpe._erf import erf
label_desc: Use image node_id 9 for calling a global function with example usage: _bisect(f, a, b, c) and returns: m