code: def string_baseform(
      string: str, allow_empty_result: bool = False
  ) -> str:
      """Normalize the string input to a uniform form.
  
      If input is a string containing alphanumeric characters or if allow_empty_result is set to True,
      removes all non-alphanumeric characters and convert characters to lower form.
  
      Parameters
      ----------
      allow_empty_result : bool , default : False
          bool indicating whether to return empty result if no alphanumeric characters are present or the original input
      string : str
          string to remove special characters from
  
      Returns
      -------
      str
          original input if condition is not met or lower form alphanumeric characters of input.
      """
      if not isinstance(string, str):
          return string
      lower_alphanumeric_form = string.translate(DEL_MAP).lower()
      if len(lower_alphanumeric_form) > 0 or allow_empty_result:
          return lower_alphanumeric_form
      else:
          return string
  
imports: import io
  import itertools
  import json
  import os
  import random
  import re
  import sys
  import typing
  from collections import defaultdict
  from copy import copy
  from datetime import datetime
  from decimal import Decimal
  from string import ascii_uppercase, digits
  import numpy
  import pandas
  from ipywidgets import Widget
  from ipywidgets.embed import dependency_state, embed_data, escape_script, snippet_template, widget_view_template
  from packaging.version import Version
  from pandas.core.dtypes.common import is_numeric_dtype
  import deepchecks
  from deepchecks import core
  from deepchecks.core.resources import jupyterlab_plotly_script, requirejs_script, suite_template, widgets_script
  from deepchecks.utils.typing import Hashable
label_desc: Use image node_id 8 for calling a global function with example usage: string_baseform(string, allow_empty_result) and returns: string, lower_alphanumeric_form, string