Python - 将矩阵转换为集合的集合

在本文中，任务是编写Python程序将矩阵转换为集合的集合。

例子：

Input : test_list = [[5, 6, 3], [1, 7, 9], [8, 2, 0]]

Output : {frozenset({8, 0, 2}), frozenset({1, 9, 7}), frozenset({3, 5, 6})}

Explanation : Converted to sets of frozensets to remain immuatable and hashable.

Input : test_list = [[5, 6, 3], [1, 7, 9]]

Output : {frozenset({1, 9, 7}), frozenset({3, 5, 6})}

Explanation : Converted to sets of frozensets to remain immuatable and hashable.

方法 #1：使用set() + freezeset() + 生成器表达式

在此，我们执行迭代直到生成器表达式中的 Matrix 以获取内部集合，并使用 set() 将外部容器转换为集合。内部容器需要是可散列的，因此必须使用frozenset() 来创建。

Python3

# Python3 code to demonstrate working of
# Convert Matrix to Sets of Set
# Using set() + frozenset() + generator expression
  
# initializing list
test_list = [[5, 6, 3], [1, 7, 9], [8, 2, 0]]
  
# printing original list
print("The original list is : " + str(test_list))
  
# frozenset() to get inner elements hashable required for set()
res = set(frozenset(sub) for sub in test_list)
  
# printing result
print("Converted set Matrix : " + str(res))

输出：

The original list is : [[5, 6, 3], [1, 7, 9], [8, 2, 0]]

Converted set Matrix : {frozenset({8, 0, 2}), frozenset({1, 9, 7}), frozenset({3, 5, 6})}

方法 #2：使用map() + freezeset() + set()

其中，map() 用于扩展将内部容器转换为frozenset() 的逻辑。

蟒蛇3

# Python3 code to demonstrate working of
# Convert Matrix to Sets of Set
# Using map() + frozenset() + set()
  
# initializing list
test_list = [[5, 6, 3], [1, 7, 9], [8, 2, 0]]
  
# printing original list
print("The original list is : " + str(test_list))
  
# map() to extend logic to inner elements
res = set(map(frozenset, test_list))
  
# printing result
print("Converted set Matrix : " + str(res))

输出：

The original list is : [[5, 6, 3], [1, 7, 9], [8, 2, 0]]

Converted set Matrix : {frozenset({8, 0, 2}), frozenset({1, 9, 7}), frozenset({3, 5, 6})}