code: def _get_lines(self, rows: int | None = None) -> list[list[Scalar]]:
      lines = self.buf
      new_rows = None
  
      # already fetched some number
      if rows is not None:
          # we already have the lines in the buffer
          if len(self.buf) >= rows:
              new_rows, self.buf = self.buf[:rows], self.buf[rows:]
  
          # need some lines
          else:
              rows -= len(self.buf)
  
      if new_rows is None:
          if isinstance(self.data, list):
              if self.pos > len(self.data):
                  raise StopIteration
              if rows is None:
                  new_rows = self.data[self.pos :]
                  new_pos = len(self.data)
              else:
                  new_rows = self.data[self.pos : self.pos + rows]
                  new_pos = self.pos + rows
  
              new_rows = self._remove_skipped_rows(new_rows)
              lines.extend(new_rows)
              self.pos = new_pos
  
          else:
              new_rows = []
              try:
                  if rows is not None:
                      rows_to_skip = 0
                      if (
                          self.skiprows is not None
                          and self.pos is not None
                      ):
                          # Only read additional rows if pos is in skiprows
                          rows_to_skip = len(
                              set(self.skiprows) - set(range(self.pos))
                          )
  
                      for _ in range(rows + rows_to_skip):
                          # assert for mypy, data is Iterator[str] or None, would
                          # error in next
                          assert self.data is not None
                          new_rows.append(next(self.data))
  
                      len_new_rows = len(new_rows)
                      new_rows = self._remove_skipped_rows(new_rows)
                      lines.extend(new_rows)
                  else:
                      rows = 0
  
                      while True:
                          new_row = self._next_iter_line(
                              row_num=self.pos + rows + 1
                          )
                          rows += 1
  
                          if new_row is not None:
                              new_rows.append(new_row)
                      len_new_rows = len(new_rows)
  
              except StopIteration:
                  len_new_rows = len(new_rows)
                  new_rows = self._remove_skipped_rows(new_rows)
                  lines.extend(new_rows)
                  if len(lines) == 0:
                      raise
              self.pos += len_new_rows
  
          self.buf = []
      else:
          lines = new_rows
  
      if self.skipfooter:
          lines = lines[: -self.skipfooter]
  
      lines = self._check_comments(lines)
      if self.skip_blank_lines:
          lines = self._remove_empty_lines(lines)
      lines = self._check_thousands(lines)
      return self._check_decimal(lines)
  
imports: from __future__ import annotations
  from collections import abc, defaultdict
  import csv
  from io import StringIO
  import re
  import sys
  from typing import IO, TYPE_CHECKING, DefaultDict, Hashable, Iterator, List, Literal, Mapping, Sequence, cast
  import numpy
  from pandas._libs import lib
  from pandas._typing import ArrayLike, ReadCsvBuffer, Scalar
  from pandas.errors import EmptyDataError, ParserError
  from pandas.core.dtypes.common import is_integer
  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 23 for calling the PythonParser obj's underlying member method code with example usage: obj._get_lines(rows) and returns: self