[已解决]循环条件判定

CrazyPanda

为什么我这段代码老显示有语法错误，感觉没有用错什么呀，在小于号那里标红了，请问这是为什么呢

a = [(1,0),(2,1),(2,3),(4,5),(3,7)]
b = [(12,0),(22,1),(2,13),(4,25),(5,7)]
i = 0
t = 0
k = 0
for i < len(a) :
    t = t + a[i][0]
    k = k + a[i][1]
    i += 1
print(t,k)

最佳答案

月排行榜 / 总排行榜

jackz007

2021-10-6 11:54:57

a = [(1,0),(2,1),(2,3),(4,5),(3,7)]
b = [(12,0),(22,1),(2,13),(4,25),(5,7)]
t , k = 0 , 0
for i in range(len(a)):
    t += a[i][0]
    k += a[i][1]
print(t,k)

    或

a = [(1,0),(2,1),(2,3),(4,5),(3,7)]
b = [(12,0),(22,1),(2,13),(4,25),(5,7)]
t , k = 0 , 0
for x , y in a:
    t += x
    k += y
print(t,k)

跳转到最佳答案楼层

z5560636

语法不对，把 for 改成while
for 在 python 里面一般是用迭代的

a = [(1,0),(2,1),(2,3),(4,5),(3,7)]
b = [(12,0),(22,1),(2,13),(4,25),(5,7)]
i = 0
t = 0
k = 0
while i < len(a) :
    t = t + a[i][0]
    k = k + a[i][1]
    i += 1
print(t,k)

jackz007

a = [(1,0),(2,1),(2,3),(4,5),(3,7)]
b = [(12,0),(22,1),(2,13),(4,25),(5,7)]
t , k = 0 , 0
for i in range(len(a)):
    t += a[i][0]
    k += a[i][1]
print(t,k)

    或

a = [(1,0),(2,1),(2,3),(4,5),(3,7)]
b = [(12,0),(22,1),(2,13),(4,25),(5,7)]
t , k = 0 , 0
for x , y in a:
    t += x
    k += y
print(t,k)

傻眼貓咪

for 循环语句必须要有区间或迭代（range/iterate），你的代码 for i < len(a) 不是区间或迭代，而是条件语句
除非用 while 循环语句 （只需要退出条件便可），如：i = 0 while i < len(a)