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How to use _regex_replacer_helper method in localstack

Best Python code snippet using localstack_python

transformer.py

Source:transformer.py

...111        self.regex = regex112        self.replacement = replacement113    def transform(self, input_data: dict, *, ctx: TransformContext) -> dict:114        compiled_regex = re.compile(self.regex) if isinstance(self.regex, str) else self.regex115        def _regex_replacer_helper(pattern: Pattern[str], repl: str):116            def replace_val(s):117                result = re.sub(pattern, repl, s)118                if result != s:119                    SNAPSHOT_LOGGER.debug(f"Replacing regex '{pattern.pattern}' with '{repl}'")120                else:121                    SNAPSHOT_LOGGER.debug(f"No match found for regex '{pattern.pattern}'")122                return result123            return replace_val124        ctx.register_serialized_replacement(125            _regex_replacer_helper(compiled_regex, self.replacement)126        )127        SNAPSHOT_LOGGER.debug(128            f"Registering regex pattern '{compiled_regex.pattern}' in snapshot with '{self.replacement}'"129        )130        return input_data131class KeyValueBasedTransformer:132    def __init__(133        self,134        match_fn: Callable[[str, str], Optional[str]],135        replacement: str,136        replace_reference: bool = True,137    ):138        self.match_fn = match_fn139        self.replacement = replacement...

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