如何在Python测试框架中实现TestNG侦听器？

该类将从像这样的测试用例中调用，例如TestStatus.mark（'testName'，result，'要记录的消息'）result是一个布尔值

class TestStatus(unittest.TestCase):

    def __init__(self):
        super(TestStatus, self).__init__()

    def mark(self, testName, result, resultMessage):
        testName = testName.lower()
        try:
            if result:
                self.log.info("Verification successful :: " + resultMessage)
            else:
                # If the test fails,
                # this calls screenshot method from util class
                self.util.screenShot("FAIL" + mapKey)
                self.log.info("Verification failed :: " + resultMessage)
        except:
            self.log.info("### Exception Occurred !!!")
            traceback.print_stack()
这是测试用例类中的一个示例测试用例：

def test_accountSignup(self):
    # Generate a username and password to use in the test case
    userName = self.util.getUniqueName()
    password = self.util.getUniqueName()
    # You can ignore this, this is calling a method
    # signup from the account page (page object model)
    self.accounts.signup(userName, password)
    # This call is also from the page object, 
    # it checks if the sign up was successful
    # it returns a boolean
    result = isSignUpSuccessful()
    # test_status object was created in the setUp method
    #
    self.test_status.mark("test_accountSignup", result,
                               "Signup was successful")