*分解操作报错

简单的去头尾求平均值操作，代码如下：

def avg(x):
    return sum(x)/len(x)
def drop_first_last(grades):
    first,*middle,last = grades
    return avg(middle)
Mygrades=[98,59,61,60]
drop_first_last(Mygrades)

报错信息为

first, *middle, last = grades
^

SyntaxError: invalid syntax

qq_strengthoo_0

2017-02-20

源自：python进阶 2-13

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1 回答

Allen_Qiu
2017-02-20

def avg(x):
    return sum(x)/len(x)
def drop_first_last(grades):
    # first,*middle,last = grades
    return avg(grades[1:-1])
Mygrades=[98,59,61,60]
print drop_first_last(Mygrades)