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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 is_running(self):
 """Property method that returns a bool specifying if the process is currently running. This will return true if the state is active, idle or initializing. :rtype: bool """

        return self._state in [self.STATE_ACTIVE,
                               self.STATE_IDLE,
                               self.STATE_INITIALIZING]