unclecode/crawl4ai · error · AttributeError

{k} is deprecated, {RegexExtractionStrategy._UNWANTED_PROPS[

Error message

{k} is deprecated, {RegexExtractionStrategy._UNWANTED_PROPS[k]}

What it means

Error "{k} is deprecated, {RegexExtractionStrategy._UNWANTED_PROPS[k]}" thrown in unclecode/crawl4ai.

Source

Thrown at crawl4ai/extraction_strategy.py:2761

    @staticmethod
    def generate_pattern(
        label: str,
        html: str,
        *,
        query: Optional[str] = None,
        examples: Optional[List[str]] = None,
        llm_config: Optional[LLMConfig] = None,
        **kwargs,
    ) -> Dict[str, str]:
        """
        Ask an LLM for a single page-specific regex and return
            {label: pattern}   ── ready for RegexExtractionStrategy(custom=…)
        """

        # ── guard deprecated kwargs
        for k in RegexExtractionStrategy._UNWANTED_PROPS:
            if k in kwargs:
                raise AttributeError(
                    f"{k} is deprecated, {RegexExtractionStrategy._UNWANTED_PROPS[k]}"
                )

        # ── default LLM config
        if llm_config is None:
            llm_config = create_llm_config()

        # ── system prompt – hardened
        system_msg = (
            "You are an expert Python-regex engineer.\n"
            f"Return **one** JSON object whose single key is exactly \"{label}\", "
            "and whose value is a raw-string regex pattern that works with "
            "the standard `re` module in Python.\n\n"
            "Strict rules (obey every bullet):\n"
            "• If a *user query* is supplied, treat it as the precise semantic target and optimise the "
            "  pattern to capture ONLY text that answers that query. If the query conflicts with the "
            "  sample HTML, the HTML wins.\n"
            "• Tailor the pattern to the *sample HTML* – reproduce its exact punctuation, spacing, "

View on GitHub (pinned to 7e80152142)

Solutions

1. Remove the deprecated property and use the replacement indicated in the message.
2. Check the RegexExtractionStrategy documentation for the current property names.

Example fix

# Replace deprecated kwarg with the supported one per the deprecation message

When it happens

Trigger: Thrown at crawl4ai/extraction_strategy.py:2761 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of unclecode/crawl4ai@7e80152142 (2026-08-14). Data as JSON: /api/errors/02b2d2969b313d52. Report an issue: GitHub.