code: def _check_thousands(
      self, lines: list[list[Scalar]]
  ) -> list[list[Scalar]]:
      if self.thousands is None:
          return lines
  
      return self._search_replace_num_columns(
          lines=lines, search=self.thousands, replace=""
      )
  
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 20 for calling the PythonParser obj's underlying member method code with example usage: obj._check_thousands(lines) and returns: self, lines