求三位和放到列表里

求三位和放到列表里

a = [11,345,21,7]
b = []
for i in a:
    sum = 0
    ii = '|'.join(str(i))
    iii = ii.split('|')
    for x in iii:
        sum += int(x)
    b.append(sum)
print(b)

额。。。str 可以遍历。。。忘记了
for i in a:
    sum = 0
    for ii in str(i):
        sum += int(ii)
    b.append(sum)