code: def test_header_multiple_whitespaces(all_parsers):
      # GH#54931
      parser = all_parsers
      data = """aa    bb(1,1)   cc(1,1)
                  0  2  3.5"""
  
      result = parser.read_csv(StringIO(data), sep=r"\s+")
      expected = DataFrame({"aa": [0], "bb(1,1)": 2, "cc(1,1)": 3.5})
      tm.assert_frame_equal(result, expected)
  
imports: from collections import namedtuple
  from io import StringIO
  import numpy
  import pytest
  from pandas.errors import ParserError
  from pandas import DataFrame, Index, MultiIndex
  import pandas._testing
label_desc: Use image node_id 30 for calling a global function with example usage: test_header_multiple_whitespaces(all_parsers) without return types