code: def invert_label(args, column):
      """Invert mapping.
      Find key corresponding to value column in dict args["labels"].
      Returns `column` if the value does not exist.
      """
      reversed_labels = {
          value: key for (key, value) in args["labels"].items()
      }
      try:
          return reversed_labels[column]
      except Exception:
          return column
  
imports: import plotly.graph_objs
  import plotly.io
  from collections import namedtuple, OrderedDict
  from ._special_inputs import IdentityMap, Constant, Range
  from .trendline_functions import ols, lowess, rolling, expanding, ewm
  from _plotly_utils.basevalidators import ColorscaleValidator
  from plotly.colors import qualitative, sequential
  import math
  from packaging import version
  import pandas
  import numpy
  from plotly._subplots import make_subplots, _set_trace_grid_reference, _subplot_type_for_trace_type
label_desc: Use image node_id 4 for calling a global function with example usage: invert_label(args, column) and returns: reversed_labels, column