在Python 3中将utf-8 Unicode序列转换为utf-8字符
我正在从as s3存储桶中读取数据，而s3存储桶恰好用双反斜杠转义了Unicode字符。
I'm reading data from an aws s3 bucket which happens to have unicode chars escaped with double backslashes.
双反斜杠使Unicode序列解析为一系列utf-8个字符，而不是Unicode表示的字符。
The double backslashes makes the unicode sequence parsed as a series of utf-8 characters instead of the character which the unicode represents.
该示例说明了这种情况。
The example illustrates the situation.
>>> s1="1+1\\u003d2"
>>> print(s1)
1+1\u003d2
实际的unicode序列在此
The actual unicode sequence would in this case an equal sign.
>>> s2="1+1\u003d2"
>>> print(s2)
1+1=2
有没有办法转换序列utf-8字符在第一个示例中的位置，以便将s1表示的字符串与其unicode序列一起解析为它表示的实际utf-8符号？
Is there a way to convert the sequence of utf-8 character in the first example so that the string represented by s1 is parsed with it's unicode sequence as the actual utf-8 sign that it represents?
我相信编解码器模块提供了此实用程序：
I believe that the codecs module provides this utility:
>>> import codecs
>>> codecs.decode("1+1\\u003d2", encoding='unicode_escape')
'1+1=2'
这可能是一个更大的问题。这些字符串如何排在首位？
This probably points to a larger problem, though. How do these strings come to be in the first place?
注意，如果这是从有效的JSON字符串中提取的（在这种情况下，它将丢失引号） ，您可以简单地使用：
Note, if this is being extracted from a valid JSON string (in this case it would be missing the quotes), you could simply use:
>>> import json
>>> json.loads('"1+1\\u003d2"')
'1+1=2'