<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def getChildTimeoutValue(self):
 """get child timeout"""

        print '%s call getChildTimeoutValue' % self.port
        childTimeout = self.__sendCommand(WPANCTL_CMD + 'getporp -v Thread:ChildTimeout')[0]
        return int(childTimeout)