code: def nice_pair(df, i1, i2):
      return (
          nice_format(df.iloc[0, i1])
          if i2 is None
          else ":".join(
              (nice_format(df.iloc[0, i1]), nice_format(df.iloc[0, i2]))
          )
      )
  
file_path: DALEX/python/dalex/dalex/predict_explanations/_shap/utils.py
imports: import multiprocessing
  from copy import deepcopy
  from numpy.random import SeedSequence, default_rng
  import numpy
  import pandas
label_desc: Use image node_id 5 for calling a global function with example usage: nice_pair(df, i1, i2) and returns: unknown