在循环内使用局部函数变量

问题描述：

def loop():
    d = 0
    for x in range(12):
        d+=1 #this 'd' is not the same as the one above.
    print(d)

在上面的代码中，函数的局部变量是否仍为0?我该如何更改它以使用函数变量而不是循环的内部变量?

In the code above, wouldn't the local variable of the function still be 0? How can I change this to use the function variable instead of the internal variable of the loop?

答

我认为您在函数外部的作用域和函数内部的作用域之间感到困惑.

I think you've gotten confused between scope outside of a function and inside of it.

d = 1
def a():
    d = 0 # this is a different d from line 1
    for x in range(12):
        d += 1 # this is the same d as line 3
    print(d) # same d as line 3
print(d) # same d as line 1

您可能读过有关局部范围的变量，但感到困惑.缩进一行不会创建新的本地范围".唯一发生的时间是在函数内.

You probably read about locally scoped variables but have gotten confused. Indenting your line does not create a "new local scope". The only time that happens is within functions.

在循环内使用局部函数变量

相关推荐