python - 为什么只是 python 代码中的增强赋值语句会破坏它？

Question

为什么这个python代码运行正常，虽然输出不正确

low = 1
high = 1000

print(f"I will guess a value from {low} and {high}"
      "press 'h' or 'l' or 'c'for complete anything else to exit")

guesses = 1 
while True:
    mid = low + (high - low) // 2  
    print("is this is your guess {}".format(mid))
    inp = input()
    if inp == 'h':
        low += 1

    elif inp =='l':
        high -= 1

    elif inp == 'c':
        print('got it')

    else:
        break

但是当我只添加这行代码时，它说语法无效并中断

low = 1
high = 1000

print(f"I will guess a value from {low} and {high}"
      "press 'h' or 'l' or 'c'for complete anything else to exit")

guesses = 1 
while True:
    mid = low + (high - low) // 2  
    print("is this is your guess {}".format(mid))
    inp = input()
    if inp == 'h':
        low += 1

    elif inp =='l':
        high -= 1

    elif inp == 'c':
        print('got it')

    guesses += 1
    else:
        break

那么为什么guesses += 1只是破坏一切它只是一个计数器它在代码中没有任何作用除了计算我循环了多少次

• 如果您还可以告诉我为什么此代码不打印打印预测值，将不胜感激该程序应该是二进制搜索程序。

标签： pythonif-statementbinary-search