Python Module attribute error - python-3.x

Question

I know this topic has been came up many times, but I am totally stuck and need help. Please tell me what I have done wrong here and how to fix it. Thanks in advance.
# testcase1.py
import unittest
import sys
class Global:
b = 0
class Util_Case_ID(unittest.TestCase):
def setUp(self):
sys.path.insert(0, 'C:/**/views')
sys.path.insert(0, 'C:/**/app')
sys.path.insert(0, 'C:/**/tests')
from app.views.utility import method_a
Global.b = len(method_a())
def test1(self):
self.assertEqual(Global.b, 11)
def tearDown(self):
sys.path.remove('C:/***/app/views')
sys.path.remove('C:/***/app')
sys.path.remove('C:/*/tests')
if __name__ == "__main__":
unittest.main()
AttributeError: module 'UnitTests' has no attribute 'testcase1'
The Traceback is as follows:
Traceback (most recent call last):
File "C:\Users\*****\AppData\Roaming\JetBrains\PyCharm Edu 3.5.1\helpers\pycharm\utrunner.py", line 167, in <module>
all.addTests(testLoader.loadTestsFromTestClass(getattr(module, a[1])),
File "C:\Users\*****\AppData\Roaming\JetBrains\PyCharm Edu 3.5.1\helpers\pycharm\nose_helper\loader.py", line 108, in loadTestsFromTestClass
return self.suiteClass(ContextList(cases, context=cls))
File "C:\Users\*****\AppData\Roaming\JetBrains\PyCharm Edu 3.5.1\helpers\pycharm\nose_helper\suite.py", line 253, in __call__
return self.makeSuite(tests, context, **kw)
File "C:\Users\*****\AppData\Roaming\JetBrains\PyCharm Edu 3.5.1\helpers\pycharm\nose_helper\suite.py", line 291, in makeSuite
for ancestor in self.ancestry(context):
File "C:\Users\******\AppData\Roaming\JetBrains\PyCharm Edu 3.5.1\helpers\pycharm\nose_helper\suite.py", line 269, in ancestry
yield resolve_name('.'.join(ancestors))
File "C:\Users\*****\AppData\Roaming\JetBrains\PyCharm Edu 3.5.1\helpers\pycharm\nose_helper\util.py", line 70, in resolve_name
obj = getattr(obj, part)
AttributeError: module 'UnitTests' has no attribute 'testcase1'
Process finished with exit code 1