你如何在python中解码一个ascii字符串？
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How do you decode an ascii string in python?
提问by Shane
For example, in your python shell(IDLE):
例如，在你的 python shell(IDLE) 中：
>>> a = "\x3cdiv\x3e"
>>> print a
The result you get is:
你得到的结果是：
<div>
but if ais an ascii encoded string:
但如果a是一个ASCII编码的字符串：
>>> a = "\x3cdiv\x3e" ## it's the actual \x3cdiv\x3e string if you read it from a file
>>> print a
The result you get is:
你得到的结果是：
\x3cdiv\x3e
Now what i really want from ais <div>, so I did this:
现在我真正想要的a是<div>，所以我这样做了：
>>> b = a.decode("ascii")
>>> print b
BUT surprisingly I did NOT get the result I want, it's still:
但令人惊讶的是我没有得到我想要的结果，它仍然是：
\x3cdiv\x3e
So basically what do I do to convert a, which is \x3cdiv\x3eto b, which should be <div>?
所以基本上我该怎么办转换a，这是\x3cdiv\x3e对b，这应该是<div>？
Thanks
谢谢
采纳答案by Kabie
回答by kiriloff
With python 3.x, you would adapt Kabie answer to
使用python 3.x，您可以将 Kabie 的答案调整为
a = b"\x3cdiv\x3e"
a.decode('unicode_escape')
or
或者
a = b"\x3cdiv\x3e"
a.decode('ascii')
both give
都给
>>> a
b'<div>'
What is bprefix for ?
什么是b前缀？
Bytes literals are always prefixed with 'b' or 'B'; they produce an instance of the bytes type instead of the str type. They may only contain ASCII characters; bytes with a numeric value of 128 or greater must be expressed with escapes.
字节文字总是以“b”或“B”为前缀；它们生成 bytes 类型而不是 str 类型的实例。它们可能只包含 ASCII 字符；数值为 128 或更大的字节必须用转义符表示。
