<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def getNextTimeout(self):
 """ Returns the next internal timeout that libusb needs to handle, in seconds, or None if no timeout is needed. You should not have to call this method, unless you are integrating this class with a polling mechanism. """

        timeval = libusb1.timeval()
        result = libusb1.libusb_get_next_timeout(
            self.__context_p, byref(timeval))
        if result == 0:
            return None
        elif result == 1:
            return timeval.tv_sec + (timeval.tv_usec * 0.000001)
        raiseUSBError(result)