Python-获取前一条用例的执行结果

import unittest,HTMLTestRunner
from nose_parameterized import parameterized

def login(username,passwd):
    if username=='niuhanyang' and passwd=='123456':
        return '138'
    return False
def choujiang(sign):
    if sign == '138':
        return True
    return False

class My(unittest.TestCase):
    def alogin(self, username, passwd, hope):
        sign = login(username, passwd)
        return sign
    @parameterized.expand(
            [
                ['niuhanyang','123456','138'],
                ['niuhanyang','',False],
                ['','', False],
                ['niuhanyang','123',False]
            ]
        )
    def test_choujiang(self,username,passwd,hope):#只有test开头的用例才会被执行
        sign=self.alogin(username,passwd,hope) #获取前一条用例的执行结果，赋值给sign
        cj_res=choujiang(sign)
        self.assertEqual(cj_res,True)
if __name__=='__main__':
    suite = unittest.TestSuite()
    suite.addTest(unittest.makeSuite(My))
    fw = open('获取结果.html', 'wb')
    runner = HTMLTestRunner.HTMLTestRunner(stream=fw, title='获取前一条用例执行结果')
    runner.run(suite)

 执行结果