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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 button_change_send(self, time_boot_ms, last_change_ms, state, force_mavlink1=False):
                '''
                Report button state change

                time_boot_ms              : Timestamp (milliseconds since system boot) (uint32_t)
                last_change_ms            : Time of last change of button state (uint32_t)
                state                     : Bitmap state of buttons (uint8_t)

                '''
                return self.send(self.button_change_encode(time_boot_ms, last_change_ms, state), force_mavlink1=force_mavlink1)