code: def test_select_column_names_droplabel(dataframe, invert, expected):
      "Base DataFrame"
      columns = ["a", "Bell__Chart", "cities"]
      df = dataframe.select_columns(DropLabel(columns), invert=invert)
  
      assert_frame_equal(df, dataframe[expected])
  
imports: import datetime
  import re
  from itertools import product
  import numpy
  import pandas
  import pytest
  from pandas.api.types import is_numeric_dtype
  from pandas.testing import assert_frame_equal
  from janitor.functions.utils import DropLabel, get_columns, patterns
label_desc: Use image node_id 2 for calling a global function with example usage: test_select_column_names_droplabel(dataframe, invert, expected) without return types