5、Reverse Sort List

Reverse sort from start to end

def main():
    a = [1,2,3,4,5]
    b = []

    for i in range(0,len(a)):
        b.append(i)

    for i in range(0,len(a)):
        b[i] = a[len(a)-i-1]
    return b

if __name__ == '__main__':
    print(main())

# output:
[5, 4, 3, 2, 1]

if no b.append(i)

IndexError: list assignment index out of range

Reverse sort from start to half

def main():
    a = [1,2,3,4,5]
    tmp = 0

    for i in range(0,round(len(a)/2)):
        tmp = a[i]
        a[i] = a[len(a)-i-1]
        a[len(a)-i-1]=tmp

    return a

if __name__ == '__main__':
    print(main())
    a = [1,2,3,4,5]

tmp = a[i]
a[i] = a[len(a)-i-1]
a[len(a)-i-1]=tmp

Sort function

b = sorted(a, reverse=True)
print(b)