如何根据Python中的变量值创建一个字典 [英] How to create a dictionary based on variable value in Python

问题描述

我正在尝试创建名称来自变量的字典。

I am trying to create a dictionary where the name comes from a variable.

这是情况，因为也许有更好的方法：
我使用API​​来获取对象的属性。 （名称，说明，X，Y，Z）等。我想以对象保存数据的方式存储此信息。

Here is the situation since maybe there is a better way: Im using an API to get attributes of "objects". (Name, Description, X, Y, Z) etc. I want to store this information in a way that keeps the data by "object".

为了获得这个信息，API会遍历所有的对象。

In order to get this info, the API iterates through all the "objects".

所以我的建议是，如果对象名称是我想要捕获的对象之一，我想用这样的名字创建一个字典：

So what my proposal was that if the object name is one of the ones i want to "capture", I want to create a dictionary with that name like so:

ObjectName = {'Description': VarDescrption, 'X': VarX.. etc}

（我在哪里说Varetc ... / code>这将是API传递的该属性的值。

(Where I say "Varetc..." that would be the value of that attribute passed by the API.

现在，由于我提前知道名单，我可以使用真的很长如果树，但我正在寻找一些更容易编写代码来实现这一点的东西（和可扩展的，而不增加太多的代码）

Now since I know the list of names ahead of time, I CAN use a really long If tree but am looking for something easier to code to accomplish this. (and extensible without adding too much code)

这里是我有的代码：

def py_cell_object():
    #object counter - unrelated to question
    addtototal()
    #is this an object I want?
    if aw.aw_string (239)[:5] == "TDT3_":
        #If yes, make a dictionary with the object description as the name of the dictionary.
        vars()[aw.aw_string (239)]={'X': aw.aw_int (232), 'Y': aw.aw_int (233), 'Z': aw.aw_int (234), 'No': aw.aw_int (231)}
        #print back result to test
        for key in aw.aw_string (239):
            print 'key=%s, value=%s' % (key, aw.aw_string (239)[key])

这里是前两行的代码，以显示什么aw是

here are the first two lines of code to show what "aw" is

from ctypes import *
aw = CDLL("aw")

来解释API调用中的数字：

to explain what the numbers in the API calls are:

231 AW_OBJECT_NUMBER，

231 AW_OBJECT_NUMBER,

232 AW_OBJECT_X，

232 AW_OBJECT_X,

233 AW_OBJECT_Y，

233 AW_OBJECT_Y,

234 AW_OBJECT_Z，

234 AW_OBJECT_Z,

239 AW_OBJECT_DESCRIPTION，

239 AW_OBJECT_DESCRIPTION,

231-234是整数和239是一个字符串

231-234 are integers and 239 is a string

推荐答案

我推断你正在使用 Active Worlds SDK 。这将节省时间提到在未来的问题的第一位。

I deduce that you are using the Active Worlds SDK. It would save time to mention that in the first place in future questions.

我猜你的目标是创建一个顶级字典，其中每个键是对象描述。每个值都是另一个字典，存储该对象的许多属性。

I guess your goal is to create a top-level dictionary, where each key is the object description. Each value is another dictionary, storing many of the attributes of that object.

我快速浏览了维基上的AW SDK文档，我看不到请求SDK查询属性名称，ID和类型的列表。所以你将不得不在你的程序中硬编码这些信息。除非您在其他地方需要它，否则只需在创建字典时对其进行硬编码，这是最简单的，这正是您正在做的。要打印出来，只需打印属性字典的 repr 。我可能格式化你的方法更像这样：

I took a quick look at the AW SDK documentation on the wiki and I don't see a way to ask the SDK for a list of attribute names, IDs, and types. So you will have to hard-code that information in your program somehow. Unless you need it elsewhere, it's simplest to just hard-code it where you create the dictionary, which is what you are already doing. To print it back out, just print the attribute dictionary's repr. I would probably format your method more like this:

def py_cell_object():
    #object counter - unrelated to question
    addtototal()

    description = aw.aw_string(239)
    if description.startswith("TDT3_"):
        vars()[description] = {
            'DESCRIPTION': description,
            'X': aw.aw_int(232),
            'Y': aw.aw_int(233),
            'Z': aw.aw_int(234),
            'NUMBER': aw.aw_int (231),
            ... etc for remaining attributes
        }

        print repr(vars()[description])

有些人会认为你应该为232,233,234，等等，但是我看不到什么理由去做，除非你在多个地方需要它们，否则很容易从SDK自动生成它们（例如，通过解析一个 .h 文件）。

Some would argue that you should make named constants for the numbers 232, 233, 234, etc., but I see little reason to do that unless you need them in multiple places, or unless it's easy to generate them automatically from the SDK (for example, by parsing a .h file).

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