执行测试用例生成测试报告中报错：NameError: name 'unicode' is not defined

在执行测试用例生成测试报告中报了 NameError: name 'unicode' is not defined的错误，如下图

ft1.1: Traceback (most recent call last):
  File "D:\Pycharm\selenium_python_test\demo_unittest_Project\StartEnd.py", line 6, in setUp
    print("test start")
  File "C:\Users\linshen\AppData\Local\Programs\Python\Python39\lib\BSTestRunner.py", line 131, in write
    self.fp.write(to_unicode(s))
  File "C:\Users\linshen\AppData\Local\Programs\Python\Python39\lib\BSTestRunner.py", line 120, in to_unicode
    return unicode(s)
NameError: name 'unicode' is not defined


        

　　

问题是 ：在python2中unicode对象代表字符串，但是python3中没有unicode对象，而且传入的参数s是字节类型，这正是python3中所需要的，所以直接返回s