class Cls:
    def setUp(self):
        self.name = 'sunxiaochuan'

    def test_print(self):
        print(self.name)


if __name__ == '__main__':
    c = Cls()
    c.test_print() #AttributeError: 'Cls' object has no attribute 'name'

import unittest


class Cls(unittest.TestCase):
    def setUp(self):
        self.name = 'sunxiaochuan'

    def test_print(self):
        print(self.name)


if __name__ == '__main__':
    unittest.main()#sunxiaochuan