TypeError: issubclass() arg 1 must be a class

Question

import sys
from excel import DoExecl
import paramunittest
import unittest
from BeautifulReport import BeautifulReport as report
from datetime import datetime
from unittest import TestLoader, TestSuite, TextTestRunner

i = DoExecl().readExcel()
@paramunittest.parametrized(
    *i
)
class TestTest1(unittest.TestCase):
    def setParameters(self, url, method, header, body, expected):
        self.url = url,
        self.method = method,
        self.header = header,
        self.body = body,
        self.expected = expected

    def test_go(self):
        self.assertEqual(self.expected['apiStatus'], 0)

if __name__ == '__main__':
    # print(type(TestTest1))
    # unittest.main(verbosity=2)
    now = datetime.now().strftime('%Y年%m月%d日 %H点%M分%S秒')
    suit = unittest.TestSuite()
    #suit.addTest(unittest.makeSuite(TestTest1))
    suit.addTests(unittest.TestLoader().loadTestsFromTestCase(TestTest1))
    run_report = report(suit)
    run_report.report(
        filename=f'{now}的测试报告',
        report_dir='report',
        description='用例名称',
    )

Traceback (most recent call last):
  File "D:/weiyang/apitest/参数化.py", line 56, in <module>
    suit.addTests(unittest.TestLoader().loadTestsFromTestCase(TestDemo))
  File "C:\Users\60587\AppData\Local\Programs\Python\Python38-32\lib\unittest\loader.py", line 86, in loadTestsFromTestCase
    if issubclass(testCaseClass, suite.TestSuite):
TypeError: issubclass() arg 1 must be a class
<class 'NoneType'>

Process finished with exit code 1

paramunittest参数化执行用例，把测试类加到测试套件中时提示输入参数必须是一个类，不加入测试套件直接unittest.main(verbosity=2)执行的话可以执行，把paramunittest相关的部分注释掉了type（测试类）显示的就是一个class type，加上就变成了NoneType，有没有大佬解答一下，小白感激

Answer 1

issubclass() arg 1 must be a class，看看testCaseClass有没有getClass方法。