xxxxx.xxxxx.keywords.price.set
        ===================================
        设置一批关键词的出价

def price_set(self, adgroup_id, keywordId_prices, nick=None):
        '''xxxxx.xxxxx.keywords.price.set
        ===================================
        设置一批关键词的出价'''
        request = TOPRequest('xxxxx.xxxxx.keywords.price.set')
        request['adgroup_id'] = adgroup_id
        request['keywordId_prices'] = keywordId_prices
        if nick!=None: request['nick'] = nick
        self.create(self.execute(request))
        return self.result