关键错误' 0'具有dict格式

问题描述：

我仍然是Python的初学者，我想知道为什么这样做:

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')

给我一个关键错误"0"，但不是这个错误:

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

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

谢谢.

答

您正在尝试将键0与"0"进行比较.它们是不同的.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.

关键错误&#39; 0&#39;具有dict格式