在 Python 3 中删除字符串文字前面的“b"字符

2022-01-09 00:00:00 python string binary encryption

问题描述

我是 python 编程的新手，我有点困惑.我尝试从字符串中获取字节以进行散列和加密，但我得到了

I am new in python programming and i am a bit confused. I try to get the bytes from a string to hash and encrypt but i got

b'...'

b 字符串前面的字符，如下例所示.有什么办法可以避免这种情况吗?谁能给出解决方案?对不起这个愚蠢的问题

b character in front of string just like the below example. Is any way avoid this?.Can anyone give a solution? Sorry for this silly question

import hashlib

text = "my secret data"
pw_bytes = text.encode('utf-8')
print('print',pw_bytes)
m = hashlib.md5()
m.update(pw_bytes)

输出:

 print b'my secret data'

解决方案

解码是多余的

你一开始只有这个错误"，因为对正在发生的事情有误解.

You only had this "error" in the first place, because of a misunderstanding of what's happening.

您获得了 b，因为您编码为 utf-8，现在它是一个字节对象.

You get the b because you encoded to utf-8 and now it's a bytes object.

 >> type("text".encode("utf-8"))
 >> <class 'bytes'>

修复:

  1. 你可以先打印字符串
  2. 编码后冗余解码

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