code: def df_enc():
      df = {
          "var_A": ["A"] * 6 + ["B"] * 10 + ["C"] * 4,
          "var_B": ["A"] * 10 + ["B"] * 6 + ["C"] * 4,
          "target": [
              1,
              1,
              0,
              0,
              0,
              0,
              0,
              0,
              0,
              0,
              1,
              1,
              0,
              0,
              0,
              0,
              1,
              1,
              0,
              0,
          ],
      }
      df = pd.DataFrame(df)
  
      return df
  
file_path: feature_engine/tests/conftest.py
imports: import numpy
  import pandas
  import pytest
label_desc: Use image node_id 5 for calling a global function with example usage: df_enc() and returns: df