如何在不将其类型化列出的情况下在集合中获取输出？

Question

我正在从文本文件中读取输入，并且在某些情况下，我必须执行一些操作。输入文件的第一行包含测试用例的数量。下一行包含输入的大小。下一行由元素组成。

在接受输入并遵循正确的操作之后。由于需要维护订单，因此我正在对生成的输出进行排序。

import sys

test_case = int(sys.stdin.readline())

t = 0
while t < test_case:
    len_a, len_b = map(int, input().split())

    A = set()
    B = set()

    for element in sys.stdin.readline().split():
        A.add(int(element))

    for element in sys.stdin.readline().split():
        B.add(int(element))     

    operation = int(sys.stdin.readline())

    if operation == 1: print(sorted(set(A.intersection(B))))
    elif operation == 2: print(sorted(set(A.union(B))))
    elif operation == 3: print(sorted(set(A.symmetric_difference(B))))
    elif operation == 4: print(sorted(set(A.difference(B))))
    elif operation == 5: print(sorted(set(B.difference(A))))

    t += 1

预期的输出是这样的：

{10000、20000、30000}

{10000、20000、30000、40000、50000、60000、80000、90000}

{40000、50000、60000、80000、90000}

{40000, 50000, 60000}

{80000, 90000}

{}

但我得到了：

[10000, 20000, 30000]

[10000, 20000, 30000, 40000, 50000, 60000, 80000, 90000]

[40000, 50000, 60000, 80000, 90000]

[40000, 50000, 60000]

[80000, 90000]

设置（）

Answer 1

希望以下内容对您有所帮助。

代码

import sys

test_case = int(sys.stdin.readline())

t = 0
while t < test_case:
    len_a, len_b = map(int, input().split())

    A = set()
    B = set()

    for element in sys.stdin.readline().split():
        A.add(int(element))

    for element in sys.stdin.readline().split():
        B.add(int(element))     

    operation = int(sys.stdin.readline())

    if operation == 1: print(set(sorted(A.intersection(B))))
    elif operation == 2: print(set(sorted(A.union(B))))
    elif operation == 3: print(set(sorted(A.symmetric_difference(B))))
    elif operation == 4: print(set(sorted(A.difference(B))))
    elif operation == 5: print(set(sorted(B.difference(A))))

    t += 1

编辑 （对于您的情况，为空集打印 {} 但我猜不建议这样做）

import sys

test_case = int(sys.stdin.readline())

t = 0
while t < test_case:
    len_a, len_b = map(int, input().split())

    A = set()
    B = set()

    for element in sys.stdin.readline().split():
        A.add(int(element))

    for element in sys.stdin.readline().split():
        B.add(int(element))     

    operation = int(sys.stdin.readline())

    if operation == 1: 
      if len(A.intersection(B))!=0:
        print(set(sorted(A.intersection(B))))
      else:
        print('{}')
    elif operation == 2: 
      if len(A.union(B))!=0:
        print(set(sorted(A.union(B))))
      else:
        print('{}')
    elif operation == 3: 
      if len(A.symmetric_difference(B))!=0:
        print(set(sorted(A.symmetric_difference(B))))
      else:
        print('{}')
    elif operation == 4: 
      if len(A.difference(B))!=0:
        print(set(sorted(A.difference(B))))
      else:
        print('{}')
    elif operation == 5: 
      if len(B.difference(A))!=0:
        print(set(sorted(B.difference(A))))
      else:
        print('{}')

    t += 1

我已经测试过了，工作正常。希望这能解决您的问题！