section 3.5: a recipient MAY recognize a single LF as a line # terminator and ignore any preceding CR. _CRLF_RE = re.compile(r"\r?\n") class _NormalizedHeaderCache(dict): """Dynamic cached mapping coroutine, so we can rely on the cr_running attribute. if self._test_generator is not None and getattr( self._test_generator, "cr_running", True ):

5: a recipient MAY recognize a single LF as a line # terminator and ignore any preceding CR. for line in headers.split("\n"): if line.endswith("\r"): line = line[:-1] coroutine, so we can rely on the cr_running attribute. if self._test_generator is not None and getattr( self._test_generator, "cr_running", True ):

deprecated features of HTTP will become errors. Specifically, line folding and the use of LF (with CR) as a line separator will be removed. classmethod parse(headers: str, *, _chars_are_bytes: bool =

deprecated features of HTTP will become errors. Specifically, line folding and the use of LF (with CR) as a line separator will be removed.classmethod parse(headers: str [https://docs.python.org/3/library/stdtypes