code: def test_select_columns_only_args(dataframe):
      """Test output for columns only"""
      actual = dataframe.select("col1", "col2", axis="columns")
      expected = dataframe.loc[:, :]
      assert_frame_equal(actual, expected)
  
imports: import numpy
  import pandas
  import pytest
  from pandas.testing import assert_frame_equal
  from janitor.functions.utils import DropLabel
label_desc: Use image node_id 13 for calling a global function with example usage: test_select_columns_only_args(dataframe) without return types