code: def treemap_data():
      volume = [350, 220, 170, 150, 50]
      labels = [
          "Liquid\n volume: 350k",
          "Savoury\n volume: 220k",
          "Sugar\n volume: 170k",
          "Frozen\n volume: 150k",
          "Non-food\n volume: 50k",
      ]
      dfs = []
      for g in ["group1", "group2"]:
          dfs.append(
              pd.DataFrame(dict(group=g, volume=volume, label=labels))
          )
      return pd.concat(dfs, ignore_index=True)
  
imports: import getpass
  import os
  import random
  import string
  import unittest
  import numpy
  import pandas
  import pytest
  from pandas.tseries.offsets import Day
  from past.utils import old_div
  from six import PY3
label_desc: Use image node_id 13 for calling a global function with example usage: treemap_data() and returns: pd