code: def diabetes_data():
      data_dir = join(dirname(__file__), "data")
      data = pd.read_csv(join(data_dir, "diabetes.txt"), sep="\t")
      data["age_grp"] = 0
      data.loc[data["AGE"] > 40, "age_grp"] = 1
      data.loc[data["AGE"] > 60, "age_grp"] = 2
      return data
  
imports: from os.path import dirname, join
  import pytest
  import numpy
  import pymc
  import pandas
  from scipy import special
  import bambi
label_desc: Use image node_id 1 for calling a global function with example usage: diabetes_data() and returns: data