Question

我有一个清单

MENU_Items = [ {  "ID":0x3B08, "Description":"Read Levelling Status\t\t"},    
                { "ID":0x3B39, "Description":"Read Air system control module state"},
                { "ID":0x3B3A, "Description":"Read Movement inhibit state\t"},     
                { "ID":0x3B3B, "Description":"Read Target height status\t\t"}]

输入= 1

MENU_Items [输入 - 1]

我得到的结果如下：

{'ID': 15112, 'Description': 'Read Levelling Status\t\t'}

我想只提取'ID'作为输出

I am trying something like this MENU_Items[Input - 1].ID

它不起作用。

Answer 1

MENU_Items[Input - 1]你将是第一个元素的第一个元素，它是一个对象。 ['ID']代替.ID将为您提供该对象的ID

因此，请使用MENU_Items[Input - 1]['ID']

Answer 2

那么为什么不这样做呢：

MENU_Items = [ {  "ID":0x3B08, "Description":"Read Levelling Status\t\t"},
            { "ID":0x3B39, "Description":"Read Air system control module state"},
            { "ID":0x3B3A, "Description":"Read Movement inhibit state\t"},
            { "ID":0x3B3B, "Description":"Read Target height status\t\t"}]

print(MENU_Items[0]["ID"])

输出为

要使用用户输入执行此操作，您只需执行以下操作：

info = int(input("Please enter which ID you wish to access: "))

x = info - 1

print(MENU_Items[x]["ID"])

您的输出将根据他们选择的内容确定。我真的不会走这条路，因为没有错误处理，你不能保证他们进入一个int也会导致错误。我只是向您展示一个如何完成它的简单快速的示例。

Answer 3

 >>> MENU_Items = [ {  "ID":0x3B08, "Description":"Read Levelling Status\t\t"},    
...                 { "ID":0x3B39, "Description":"Read Air system control module state"},
...                 { "ID":0x3B3A, "Description":"Read Movement inhibit state\t"},     
...                 { "ID":0x3B3B, "Description":"Read Target height status\t\t"}]

对于input = 1，搜索index = 0

>>> MENU_Items[0]
{'ID': 15112, 'Description': 'Read Levelling Status\t\t'}
>>> MENU_Items[0]['ID']
15112

如何获取python list第一个元素id

3 个答案: