code: def chemdf():
      filename = os.path.join(TEST_DATA_DIR, "corrected_smiles.txt")
      df = pd.read_csv(filename, sep="\t", header=None).head(10)
      df.columns = ["id", "smiles"]
      return df
  
file_path: pyjanitor/tests/conftest.py
imports: import os
  import numpy
  import pandas
  import pytest
  from janitor.testing_utils import date_data
label_desc: Use image node_id 10 for calling a global function with example usage: chemdf() and returns: df