id（...）内置函数的Python反函数 [英] Python inverse function of id(...) built-in function

问题描述

id 内置函数是否存在反函数？我当时正在考虑使用它来编码和解码字符串，而不会花费太多时间或像 PyCrypto 库那样有很多开销。对我的需求很简单，所以我不想使用 PyCrypto 进行简单的编码和解码。

Is there a reverse or inverse of the id built-in function? I was thinking of using it to encode and decode string without taking too much time or having a lot of overhead like the PyCrypto library. The need for me is quite simple so I don't want to use PyCrypto for a simple encode and decode.

类似的东西：

>>> id("foobar")
4330174256
>>> reverse_id(4330174256) # some function like this to reverse.
"foobar"

推荐答案

我不想窃取回答问题的人的信用

This can be done easily by ctypes:

import ctypes
a = "hello world"
print ctypes.cast(id(a), ctypes.py_object).value
output:

hello world

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