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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def read(self, size):
 """Attempts to read data from the stream. :param size: int, The maximum amount of bytes to read. Raises :exc:`IOError` on error. """

        # If enabled tell the server that our buffer can fit the whole
        # stream, this often increases throughput alot.
        if self._update_buffer and not self._updated_buffer and self.duration:
            self.update_buffer((self.duration * 1000) + 5000)
            self._updated_buffer = True

        if not self._buf or len(self._buf) != size:
            self._buf = ffi.new("char[]", size)
            self._view = ffi.buffer(self._buf, size)

        res = librtmp.RTMP_Read(self.client.rtmp, self._buf, size)

        if res < 0:
            raise IOError("Failed to read data")

        return self._view[:res]