class_docstr: Specialization that Converts fixed-width fields into DataFrames.
  See PythonParser for details.
code: def _make_reader(
      self, f: IO[str] | ReadCsvBuffer[str]
  ) -> FixedWidthReader:
      return FixedWidthReader(
          f,
          self.colspecs,
          self.delimiter,
          self.comment,
          self.skiprows,
          self.infer_nrows,
      )
  
imports: from __future__ import annotations
  from collections import abc, defaultdict
  import csv
  from io import StringIO
  import re
  from typing import IO, TYPE_CHECKING, DefaultDict, Literal, cast
  import warnings
  import numpy
  from pandas._libs import lib
  from pandas.errors import EmptyDataError, ParserError, ParserWarning
  from pandas.util._decorators import cache_readonly
  from pandas.util._exceptions import find_stack_level
  from pandas.core.dtypes.common import is_bool_dtype, is_integer, is_numeric_dtype
  from pandas.core.dtypes.inference import is_dict_like
  from pandas.io.common import dedup_names, is_potential_multi_index
  from pandas.io.parsers.base_parser import ParserBase, parser_defaults
label_desc: Use image node_id 2 for calling the FixedWidthFieldParser obj's underlying member method code with example usage: obj._make_reader(f) and returns: FixedWidthReader