Less is More

摘要： #定义变量a>>> a = 0>>> print a0 #定义函数p()>>> def p():... print a... >>> p()0 #定义函数p2()>>> def p2():... print a... a = 3... print a... >>> p2() # 运行出错，外部变量a先被引用，不能重新赋值Traceback (most recent call last): File "<interactive input>", line 1 阅读全文