def _extract_all_branches(python_source: str):
parser = PythonParser(text=python_source)
# This is a hack to force-disable Python optimization, otherwise Python will optimize away statements like
# "if False: ..." and that would cause unexpected diffs in the coverage branches. Even when passing optimize=0 to
# compile().
parser._byte_parser = _FakeByteParser(
num_lines=len(python_source.splitlines()) + 1)
parser.parse_source()
return parser.arcs()
