context.py 文件源码

def __init__(
        self, *, cache_sketches: bool=True,
        source_encoding: str="utf-8",
            custom_escape_fns: Mapping[str, Callable[[Any], str]]={}) -> None:

        self._source_encoding = source_encoding

        escape_fns = escaping.builtin_escape_fns.copy()
        if custom_escape_fns:
            escape_fns.update(custom_escape_fns)
        self._escape_fns = types.MappingProxyType(escape_fns)

        self._stmt_classes = list(statements.builtin_stmt_classes)

        class OutputStmt(statements.BaseOutput):
            _filter_fn_names = list(self.escape_fns.keys())

        self._stmt_classes.append(OutputStmt)

        self._cache_sketches = cache_sketches