for迭代多个对象

1.传统方法

 from random import randint

 chinese = [randint(60, 100) for _ in range(40)]
 math = [randint(60, 100) for _ in range(40)]
 english= [randint(60, 100) for _ in range(40)]

 for i in range(len(math)):
     sum = chinese[i] + math[i] + english[i]
     print(sum)

2.zip实现

 from random import randint

 chinese = [randint(60, 100) for _ in range(40)]
 math = [randint(60, 100) for _ in range(40)]
 english= [randint(60, 100) for _ in range(40)]

 total = []
 for c, m, e in zip(chinese, math, english):
     total.append(c+m+e)

 print(total)

3. chain实现

from itertools import chain

c1 = [randint(60, 100) for _ in range(40)]
c2 = [randint(60, 100) for _ in range(42)]
c3 = [randint(60, 100) for _ in range(42)]
c4 = [randint(60, 100) for _ in range(39)]

count = 0

for s in chain(c1, c2, c3, c4):
    if s > 90:
        count += 1

print(count)