解码os.urandom()字节对象

问题描述

我正在尝试获取一个 private_key ，因此，我尝试了以下操作:

Im trying to get a private_key so, I tried this:

private_key = os.urandom(32).encode('hex')

但是它抛出了这个错误:

But it throws this error:

AttributeError: 'bytes' object has no attribute 'encode'

所以我检查了问题并解决了，在Python3x字节中只能解码.然后将其更改为:

So I check questions and solved that, in Python3x bytes can be only decode. Then I change it to:

private_key = os.urandom(32).decode('hex')

但是现在它抛出此错误:

But now it throws this error:

LookupError: 'hex' is not a text encoding; use codecs.decode() to handle arbitrary codecs

我真的不明白为什么.当我在上次错误之后尝试此操作时；

And I really didnt understand why. When I tried this after last error;

private_key = os.urandom(32).codecs.decode('hex')

说

所以我被卡住了，该如何解决?我听说这在Python 2x中有效，但是我需要在3x中使用.

So I stuck, what can I do for fixing this? I heard this is working in Python 2x, but I need to use it in 3x.

推荐答案

使用 binascii.hexlify .它可以在Python 2.x和Python 3.x中使用.

Use binascii.hexlify. It works both in Python 2.x and Python 3.x.

>>> import binascii
>>> binascii.hexlify(os.urandom(32))
b'daae7948824525c1b8b59f9d5a75e9c0404e46259c7b1e17a4654a7e73c91b87'

如果在Python 3.x中需要字符串对象而不是字节对象，请使用decode():

If you need a string object instead of a bytes object in Python 3.x, use decode():

>>> binascii.hexlify(os.urandom(32)).decode()
'daae7948824525c1b8b59f9d5a75e9c0404e46259c7b1e17a4654a7e73c91b87'

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