以下是我编写的求和集问题的暴力破解方法。在以下语句中出现“设置对象不可下标”错误时,无法打印“ BFI_Subset_Sum(S,k)”:“对于for可能性_targets(S [i + 1:],大小-1):”]
我该如何精确打印此功能并获得输出?
这是我的代码,谢谢:
# define Set object and attributes
class Set:
elements = {}
sum = {}
# initializing empty sets for sums and elements
empty_set = Set()
empty_set.sum = 0
empty_set.elements = {}
# set whos subsets will be evaluated
S = {3, 5, 3, 9, 18, 4, 5, 6}
# target value
k = 9
def BFI_Subset_Sum(S, k):
subsets = {}
size = 1
while size <= len(S):
for possible_target in possible_targets(S, size):
if sum(possible_target) == k:
subsets.append(possible_target)
print(possible_target)
size += 1
print(subsets)
return subsets
def possible_targets(S, size):
if len(S) <= 0 or size <= 0:
print("no subset sums to the target value")
else:
for i, num in enumerate(S):
for possible_target in possible_targets(S[i + 1:], size - 1):
yield [num] + possible_target
print(BFI_Subset_Sum(S, k))
以下是我编写的求和集问题的暴力破解方法。在出现以下语句时,出现“设置对象不可下标”错误,因此无法打印“ BFI_Subset_Sum(S,k)”:...
之所以出现此错误,是因为通过在S[i + 1:]
中使用possible_targets()
,您正在尝试选择set
对象的特定部分,该对象是无序的,并且没有实现set
方法。您可以通过按顺序使用__getitem__()
或__getitem__()
将集合转换为list
来解决此问题。