Python guessing game : IndexError: range object index out of range

Question

我创建了一个游戏，其中我 select 一个从 1 到 100 的数字，然后计算机会猜它。然而，当我 selecting 数字低于 6 时，我得到 IndexError。为什么会这样？

这是我的代码：

print("Helllo user, select a number from 1-100 in your mind and i will try to guess it...")

list_nums = range(1,101)
counter = 0

while True :
    mid_element = list_nums[int(len(list_nums)/2)-1]
    print(" Is your selected number {}".format(mid_element))
    counter = counter + 1
    response = str(input("is it too high or too low..? : "))
    try:
        if response == "too low":
            list_nums = list_nums[int(len(list_nums)/2):int(len(list_nums))]
            mid_element = list_nums[int(len(list_nums)/2)]

        elif response == "too high":
            list_nums = list_nums[1:int(len(list_nums)/2)]
            mid_element = list_nums[int(len(list_nums)/2)]

        elif response == "correct":
            print("Perfect i finally guessed it. Your number is {}\n".format(mid_element))
            break
    except:
        print("Invalid entry..Try again")
        continue

print("\nI guessed it in {} attempts".format(counter))

Answer 1

换行

list_nums = list_nums[1: int(len(list_nums)/2)]

至：

list_nums = list_nums[0: int(len(list_nums)/2)]

因为，列表索引从零开始。

或者：

list_nums = list_nums[: int(len(list_nums)/2)]

因为，Python 知道列表从零开始。

Answer 2

我在我的系统上检查了你的代码和运行。每次你的列表大小都在减少，最后它变成 0。那时当你的代码计算行 mid_element = list_nums[int(len(list_nums)/2)-1] 时，答案是 -1，它超出了运行ge.

我已经跟踪代码，输出结果如下：

Helllo user, select a number from 1-100 in your mind and i will try to guess it... Length of list_num: 100 Is your selected number 50 is it too high or too low..? : too high Length of list_num: 49 Is your selected number 25 is it too high or too low..? : too high Length of list_num: 23 Is your selected number 13 is it too high or too low..? : too high Length of list_num: 10 Is your selected number 8 is it too high or too low..? : too high Length of list_num: 4 Is your selected number 6 is it too high or too low..? : too high Length of list_num: 1 Is your selected number 6 is it too high or too low..? : too high Invalid entry..Try again Length of list_num: 0

所以根据上面的答案进行修改。

Python guessing game : IndexError: range object index out of range

Python guessing game : IndexError: range object index out of range

python

python-3.x

index-error