请求拼接

def get_data(self, beginDay,endDay):
url = self.domain + '/basMC/console/commonAnalysisV3/main.do'
req_data = 'method=getCommonSimpleLine&beginDay=' + beginDay + '&endDay='+ endDay +'&type=apps&dimension=statAppMPHot&indicator=startups&uaId=8&responseType=json'

beginDay=' + 变量 + '

method=getCommonSimpleLine&beginDay（固定的值）