Python. Error: Typeerror:issubclass () Arg 1 must be a class

Traceback (most recent):
File "e:/2017work/2017 December/pytest/unittesttest/testtest.py", line 5, <module>
Suite1=unittest. Testloader (). Loadtestsfromtestcase (Unittesttest.mytest)
File "D:\Python36\lib\unittest\loader.py", line +, in Loadtestsfromtestcase
If Issubclass (Testcaseclass, Suite. TestSuite):
Typeerror:issubclass () Arg 1 must be a class

Workaround:

The cause of this problem is that unitesttest.mytest just navigates to the MyTest file and does not locate this class for mytest, the correct class should be:

UnittestTest.MyTest.MyTest

Python. Error: Typeerror:issubclass () Arg 1 must be a class