'check whether the input ospf spf intelligent timer start interval is valid'

def is_valid_spf_start_interval(self):

    if (not self.spfstartinterval.isdigit()):
        return False
    if ((int(self.spfstartinterval) > 1000) or (int(self.spfstartinterval) < 1)):
        return False
    return True
