code: def test_simplify_pred_cols():
      pred_cols = [
          "C(Q('events_Chinese New Year_minus_1'), levels=['', 'event'])[T.event]",
          "C(Q('str_dow'), levels=['1-Mon', '2-Tue', '3-Wed', '4-Thu', '5-Fri', '6-Sat', '7-Sun'])[T.2-Tue]",
          "changepoint1_2018_09_02_00",
          "cos1_ct1_yearly_2019_02_05_00",
          "no_prefix",
      ]
      new_pred_cols = simplify_pred_cols(pred_cols)
      assert new_pred_cols == [
          "events_Chinese New Year-1",
          "str_dow_2-Tue",
          "cp1_2018_09_02_00",
          "cos1_ct1_yearly_2019_02_05_00",
          "no_prefix",
      ]
  
file_path: greykite/greykite/tests/algo/common/test_col_name_utils.py
imports: import pandas
  from greykite.algo.common.col_name_utils import add_category_cols
  from greykite.algo.common.col_name_utils import create_pred_category
  from greykite.algo.common.col_name_utils import filter_coef_summary
  from greykite.algo.common.col_name_utils import simplify_changepoints
  from greykite.algo.common.col_name_utils import simplify_event
  from greykite.algo.common.col_name_utils import simplify_name
  from greykite.algo.common.col_name_utils import simplify_pred_cols
  from greykite.algo.common.col_name_utils import simplify_time_features
label_desc: Use image node_id 5 for calling a global function with example usage: test_simplify_pred_cols() without return types