1、打开Python开发工具IDLE，新建‘所鼙艘疯zuoyongyu.py’文件，并编写代码如下：def test(): a = 'a' print (a)if __name__ == '__main__': test() print (a)
3、将变量a的定义放到函数外，代码如下：a = 'a'def test(): print (a)if __name__ == '__main__': test() print (a)
5、嵌套函数变量作用域，外层函数定义的变量在内层有效，外层函数碌巫谫浪执行完后，变量才被释放，修改代码如下:def test(): a = 'a' print (a) def testin(): print (a) return testinif __name__ == '__main__': tw = test() tw()
7、再次修改代码，测试函数体内修改全局变量，代码如下：a = 'a'def test(): a = 'abc' print (a)if __name__ == '__main__': test() print (a)
9、为验证上一步的观点，打祥缮乖贝印出变量a的地址修改代码如下：a = 'a'def test烫喇霰嘴(): a = 'abc' print (id(a))if __name__ == '__main__': test() print (id(a))
