import unittest class TestDict(unittest.TestCase):
引用unitest模块，然后定义一个测试类，继承unitest.TestCase。
方法测试前置操作setup
def setUp(self): # Hook method for setting up the test fixture before exercising it. print(‘每次执行都先经过我‘)
方法测试后置操作
def tearDown(self): # Hook method for deconstructing the test fixture after testing it. print(‘每次结束前执行‘)
原文：https://www.cnblogs.com/jmwmj/p/9032936.html