python函数全局变量和局部变量

#!/usr/bin/python#coding:utf8x = 'i am global var'#全局变量def fun():x = 100          #局部变量global y         #强制声明全局变量y = 200print xfun()                #局部变量 x=100print x              #全局变量 x='i am global var'print y              #调用函数时才可以打印200def fun1():global xx=300print x              #x='i am global var'fun1()print x              #x=300