dict 格式的键错误“0"

2022-01-15 00:00:00 python dictionary format if-statement keyerror

问题描述

我还是 Python 的初学者，我想知道为什么会这样:

I'm still a beginner in Python, and I wanted to know why this :

    dict = {}
    dict[0] = '123'
    a = 0
    if dict["{}".format(a)]["{}".format(a)] == '1':
        print('True')

给我一​​个 Key Error '0' 但不是这个:

gives me a Key Error '0' but not this :

    dict = {}
    dict[0] = '123'
    if dict[0][0] == '1':
       print('True')

提前致谢.

解决方案

您正在尝试将键 0 与0"进行比较.他们是不同的.一个是整数，另一个是字符串.

You're trying to compare the key 0 with "0". They are different. One is an integer and another is a string.

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