code: def _escape_col_name(columns, col_name, extra):
      while columns is not None and (
          col_name in columns or col_name in extra
      ):
          col_name = "_" + col_name
      return col_name
  
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 27 for calling a global function with example usage: _escape_col_name(columns, col_name, extra) and returns: col_name