code: def validate_hist_bins(s):
      valid_strs = [
          "auto",
          "sturges",
          "fd",
          "doane",
          "scott",
          "rice",
          "sqrt",
      ]
      if isinstance(s, str) and s in valid_strs:
          return s
      try:
          return int(s)
      except (TypeError, ValueError):
          pass
      try:
          return validate_floatlist(s)
      except ValueError:
          pass
      raise ValueError(
          f"'hist.bins' must be one of {valid_strs}, an int or"
          " a sequence of floats"
      )
  
imports: import ast
  from functools import lru_cache, reduce
  from numbers import Real
  import operator
  import os
  import re
  import numpy
  from matplotlib import _api, cbook
  from matplotlib.cbook import ls_mapper
  from matplotlib.colors import Colormap, is_color_like
  from matplotlib._fontconfig_pattern import parse_fontconfig_pattern
  from matplotlib._enums import JoinStyle, CapStyle
  from cycler import Cycler, cycler
label_desc: Use image node_id 40 for calling a global function with example usage: validate_hist_bins(s) and returns: s, int, validate_floatlist