使用Python 3进行哈希处理:是否需要对每个字符串进行.encode()? [英] Hashing with Python 3: Do I need to .encode() every string?
问题描述
我正在从Python 2迁移到Python 3,想知道是否现在需要对每个字符串文字进行编码,然后才能对其进行哈希处理.示例代码将在Python 2下完美运行:
I'm migrating from Python 2 to Python 3 and wonder if every string literal needs to be encoded now before you can hash it. Example code will run perfectly under Python 2:
import hashlib
string = "robots"
hashlib.md5(string).hexdigest()
但是使用Python 3,它会引发一个 TypeError:Unicode对象必须在散列之前进行编码
,因此我必须在每个字符串或字符串后附加一个 .encode()
.我在这里想念东西吗?
using Python 3 however, it throws a TypeError: Unicode-objects must be encoded before hashing
so I have to append an .encode()
after each string or am I missing something here?
推荐答案
hashlib
在文档明确指出:
注意:不支持将字符串对象输入到
update()
中,因为散列仅适用于字节,而不适用于字符.
Note: Feeding string objects into
update()
is not supported, as hashes work on bytes, not on characters.
因此,只要您想在Python 3中对 str
对象进行哈希处理,就必须先对其进行编码.
So any time you'd like to hash a str
object in Python 3, you have to encode it first.
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