code: def test_decompression_regex_sep(
      python_parser_only, csv1, compression, klass
  ):
      # see gh-6607
      parser = python_parser_only
  
      with open(csv1, "rb") as f:
          data = f.read()
  
      data = data.replace(b",", b"::")
      expected = parser.read_csv(csv1)
  
      module = pytest.importorskip(compression)
      klass = getattr(module, klass)
  
      with tm.ensure_clean() as path:
          with klass(path, mode="wb") as tmp:
              tmp.write(data)
  
          result = parser.read_csv(
              path, sep="::", compression=compression
          )
          tm.assert_frame_equal(result, expected)
  
imports: from __future__ import annotations
  import csv
  from io import BytesIO, StringIO, TextIOWrapper
  from typing import TYPE_CHECKING
  import numpy
  import pytest
  from pandas.errors import ParserError, ParserWarning
  from pandas import DataFrame, Index, MultiIndex
  import pandas._testing
label_desc: Use image node_id 9 for calling a global function with example usage: test_decompression_regex_sep(python_parser_only, csv1, compression, klass) without return types