code: def test_read_csv_buglet_4x_multi_index(python_parser_only):
      # see gh-6607
      data = """                      A       B       C       D        E
  one two three   four
  a   b   10.0032 5    -0.5109 -2.3358 -0.4645  0.05076  0.3640
  a   q   20      4     0.4473  1.4152  0.2834  1.00661  0.1744
  x   q   30      3    -0.6662 -0.5243 -0.3580  0.89145  2.5838"""
      parser = python_parser_only
  
      expected = DataFrame(
          [
              [-0.5109, -2.3358, -0.4645, 0.05076, 0.3640],
              [0.4473, 1.4152, 0.2834, 1.00661, 0.1744],
              [-0.6662, -0.5243, -0.3580, 0.89145, 2.5838],
          ],
          columns=["A", "B", "C", "D", "E"],
          index=MultiIndex.from_tuples(
              [
                  ("a", "b", 10.0032, 5),
                  ("a", "q", 20, 4),
                  ("x", "q", 30, 3),
              ],
              names=["one", "two", "three", "four"],
          ),
      )
      result = parser.read_csv(StringIO(data), sep=r"\s+")
      tm.assert_frame_equal(result, expected)
  
imports: from __future__ import annotations
  import csv
  from io import BytesIO, StringIO, TextIOWrapper
  from typing import TYPE_CHECKING
  import numpy
  import pytest
  from pandas.errors import ParserError, ParserWarning
  from pandas import DataFrame, Index, MultiIndex
  import pandas._testing
label_desc: Use image node_id 10 for calling a global function with example usage: test_read_csv_buglet_4x_multi_index(python_parser_only) without return types