decode(unicode_escape) in python 3 a string

问题

I've checked this solution but it doesn't work in python3.

I've an escaped string of this kind: str = "Hello\\nWorld" and I want to obtain the same string unescaped: str_out = Hello\nWorld

I tried with this without succes: AttributeError: 'str' object has no attribute 'decode'

Here my sample code:

str = "Hello\\nWorld"
str.decode('unicode_escape')

回答1:

decode applies to bytes, which you can create by encoding from your string.

I would encode (using default) then decode with unicode-escape

>>> s = "Hello\\nWorld"
>>> s.encode()
b'Hello\\nWorld'
>>> s.encode().decode("unicode-escape")
'Hello\nWorld'
>>> print(s.encode().decode("unicode-escape"))
Hello
World
>>> 

来源：https://stackoverflow.com/questions/48908131/decodeunicode-escape-in-python-3-a-string