code: def df_checks():
      """fixture dataframe"""
      return pd.DataFrame(
          {
              "fam_id": [1, 1, 1, 2, 2, 2, 3, 3, 3],
          }
      )
  
file_path: pyjanitor/tests/functions/test_explode_index.py
imports: import pandas
  import pytest
  from pandas.testing import assert_frame_equal
label_desc: Use image node_id 1 for calling a global function with example usage: df_checks() and returns: pd