def __init__(self, stream):
# duck-type instead of checking inheritance from IOBase.
# At the least, stream must have read()
if not callable(getattr(stream, 'read', None)):
raise TypeError('I/O stream type expected')
assert not isinstance(stream, InputStream)
super().__init__()
self._stream = stream
self._binding = _awscrt.input_stream_new(self)
def __init__(self, stream):
assert isinstance(stream, io.IOBase)
assert not isinstance(stream, InputStream)
super(InputStream, self).__init__()
self._binding = _awscrt.input_stream_new(stream)