class_docstr: Base class for end-to-end testing of TFX templates.
docstr: Update given file by commenting out the `expression`.
docstr_tok: ["Update","given","file","by","commenting","out","the","`","expression","`","."]
code: def _comment(self, filepath: str, expressions: Iterable[str]) -> str:
      """Update given file by commenting out the `expression`."""
      replacements = [(s, "# " + s) for s in expressions]
      return self._replaceFileContent(filepath, replacements)
  
imports: import os
  import re
  from typing import List, Iterable, Tuple
  from tfx.tools.cli.e2e import test_utils
  from tfx.utils import io_utils
  from tfx.utils import test_case_utils
label_desc: Use image node_id 5 for calling the BaseEndToEndTest obj's underlying member method code with example usage: obj._comment(filepath, expressions) and returns: self