ignore any preceding CR. _CRLF_RE = re.compile(r"\r?\n") class _NormalizedHeaderCache(dict): """Dynamic cached mapping of header names to Http-Header-Case. Implemented as a dict subclass so that cache

Ignore this line for mypy because the abstract method checker # doesn't understand dynamic proxies. self.selector_loop = AddThreadSelectorEventLoop(asyncio_loop) # type: ignore