python怎么将转换列表里的负数,转换为正数

Question

a = [21, 2.5 , -23.2, 8.4, -4, 3, -1.03]

Answer 1

a = [21, 2.5 , -23.2, 8.4, -4, 3, -1.03]

#遍历列表
for i in range(len(a)):
    if a[i]<0:  #发现负数元素就取反
        a[i] = -a[i]
print(a)