python输出问题

Question

一行输出代码，却输出多行

from typing import List

# import keyboard
import random
import re
import itertools
import sys
import time
# import keyboard as keyboard

arr1 = []
arr = [str(random.randint(1, 13)), str(random.randint(1, 13)), str(random.randint(1, 13)),
       str(random.randint(1, 13)), ]
# arr = [1,2,3,4]
print(f'四个随机数：{arr}')
expr = input("请输入计算式：")
print(expr)
print(eval(expr))
if sorted(arr) == sorted(re.split('[\+\-\*\/\(\)]', expr)):
    if eval(expr) == 24:
        print('恭喜你答对了哟！')
    else:
        print('对不起，你答错了!')
        for i in itertools.permutations(arr):
            for j in itertools.product(['+', '-', '*', '/'], repeat=3):
                expr = [f'(({i[0]}{j[0]}{i[1]}){j[1]}{i[2]}){j[2]}{i[3]}',  # 123
                        f'({i[0]}{j[0]}{i[1]}){j[1]}({i[2]}{j[2]}{i[3]})',  # 132
                        f'({i[0]}{j[0]}({i[1]}{j[1]}{i[2]})){j[2]}{i[3]}',  # 213
                        f'{i[0]}{j[0]}(({i[1]}{j[1]}{i[2]}){j[2]}{i[3]})',  # 231
                        f'{i[0]}{j[0]}({i[1]}{j[1]}({i[2]}{j[2]}{i[3]}))',  # 321
                        ]
                for k in expr:
                    try:
                        if eval(k) == 24:
                            line = k
                            arr1.append(line)
                    except:
                        pass
            if len(arr1) != 0:
                print("正解为：" + arr1[0])
            else:
                print("此题无解")

else:
    print ('你作弊了！')
    for i in itertools.permutations(arr):
        for j in itertools.product(['+', '-', '*', '/'], repeat=3):
            expr = [f'(({i[0]}{j[0]}{i[1]}){j[1]}{i[2]}){j[2]}{i[3]}',  # 123
                    f'({i[0]}{j[0]}{i[1]}){j[1]}({i[2]}{j[2]}{i[3]})',  # 132
                    f'({i[0]}{j[0]}({i[1]}{j[1]}{i[2]})){j[2]}{i[3]}',  # 213
                    f'{i[0]}{j[0]}(({i[1]}{j[1]}{i[2]}){j[2]}{i[3]})',  # 231
                    f'{i[0]}{j[0]}({i[1]}{j[1]}({i[2]}{j[2]}{i[3]}))',  # 321
                    ]
            for k in expr:
                try:
                    if eval(k) == 24:
                        line = k
                        arr1.append(line)
                except:
                    pass

if len(arr1) != 0:
    print("正解为："+ arr1[0])
else:
    print("此题无解")
time.sleep(0.1)

Answer 1

for循环内有print函数，导致循环打印了