Method to_bytes

python/python3/tornado/test/iostream_test.py:1204–1210

(self, b)

        self.random = random.Random(42)

    def to_bytes(self, b):
        if isinstance(b, (bytes, bytearray)):
            return bytes(b)
        elif isinstance(b, memoryview):
            return b.tobytes()  # For py2
        else:
            raise TypeError(b)

    def make_streambuffer(self, large_buf_threshold=10):
        buf = _StreamBuffer()