code: def test_widths_and_usecols():
      # GH#46580
      data = """0  1    n -0.4100.1
  0  2    p  0.2 90.1
  0  3    n -0.3140.4"""
      result = read_fwf(
          StringIO(data),
          header=None,
          usecols=(0, 1, 3),
          widths=(3, 5, 1, 5, 5),
          index_col=False,
          names=("c0", "c1", "c3"),
      )
      expected = DataFrame(
          {
              "c0": 0,
              "c1": [1, 2, 3],
              "c3": [-0.4, 0.2, -0.3],
          }
      )
      tm.assert_frame_equal(result, expected)
  
imports: from datetime import datetime
  from io import BytesIO, StringIO
  from pathlib import Path
  import numpy
  import pytest
  from pandas.errors import EmptyDataError
  import pandas
  from pandas import DataFrame, DatetimeIndex
  import pandas._testing
  from pandas.core.arrays import ArrowStringArray, StringArray
  from pandas.io.common import urlopen
  from pandas.io.parsers import read_csv, read_fwf
label_desc: Use image node_id 41 for calling a global function with example usage: test_widths_and_usecols() without return types