NameError: name ‘time‘ is not defined

引入Import time這個包即可

import unittest
import time
class TestDemo(unittest.TestCase):
    @classmethod
    def setUp(self) -> None:
        print("每一個測試用例之前會自動執行")
    @classmethod
    def tearDown(self) -> None:
        print("====每一個測試用例執行之后都會自動執行一次====")
    @classmethod
    def setUpClass(cls) -> None:
        print("測試類執行開始的時候執行一次")
    @classmethod
    def tearDownClass(cls) -> None:
        print("測試類執行完成后，只執行一次")
        time.sleep(2)
    def test_01(self):
        print("test_01")
        time.sleep(2)
    def test_02(self):
        print("test_02")
        time.sleep(3)
    def test_03(self):
        print("test_03")
    def test_04(self):
        print("test_04")
    def test_05(self):
        print("test_05")
if __name__ == "__main__":
    unittest.main()