Python找到至少两个数字的和

这就是你要找的吗?它有两个for循环,一个嵌入到另一个中,遍历列表并添加数字,然后添加到字典中。

# original number list
numbers = (1,3,24,53,3565,474,23,2,546,27,578, 76,976)

# target dictonary
dict = {}

for i in range(len(numbers)):
    for j in range(len(numbers)):
        value = numbers[i] + numbers[j]
        dict[(i,j)] = value


print(dict)

这可以通过使用 itertools recipes (powerset function) .

您可以使用itertools的组合,如下所示:

from itertools import combinations
  
def combo(arr, r):
    return list(combinations(arr, r))

arr = [1, 2, 3, 4]
r = [2, 3, 4]
for rr in r:
    print (combo(arr, rr))

输出:

[(1, 2), (1, 3), (1, 4), (2, 3), (2, 4), (3, 4)]
[(1, 2, 3), (1, 2, 4), (1, 3, 4), (2, 3, 4)]
[(1, 2, 3, 4)]