code: def stringify_var_names(var_list, delimiter=""):
      """
  
      Parameters
      ----------
      var_list : list[str]
          Each list element is the name of a variable.
  
      Returns
      -------
      result : str
          Concatenated variable names.
      """
      result = var_list[0]
      for var_name in var_list[1:]:
          result += delimiter + var_name
      return result.lower()
  
file_path: statsmodels/statsmodels/tsa/vector_ar/tests/JMulTi_results/parse_jmulti_vecm_output.py
imports: import itertools
  import os
  import re
  import numpy
label_desc: Use image node_id 4 for calling a global function with example usage: stringify_var_names(var_list, delimiter) and returns: result