有没有办法在 for 循环中添加多个条件？

Question

    n=int(raw_input('enter the number of mcnuggets you want to buy : ')) #total number of               mcnuggets you want yo buy
    for a in range(1,n) and b in range(1,n) and c in range(1,n) :
        if (6*a+9*b+20*c==n):
            print 'number of packs of 6 are ',a
            print 'number of packs of 9 are ',b
            print 'number of packs of 20 are',c

我是编程新手，我正在学习 python。上面的代码给出了错误。有什么建议吗。？

Answer 1

您应该使用嵌套循环：

for a in range(1, n):
    for b in range(1, n):
        for c in range(1, n):
            if ...

或者甚至更好：

import itertools

for a, b, c in itertools.product(range(1, n + 1), repeat=3):
    if ...