如何解码转义的 Unicode 个字符？

Question

I'm trying to replace escaped Unicode characters with the actual characters:

string = "\\u00c3\\u00a4"
print(string.encode().decode("unicode-escape"))

The expected output is ä , the actual output is ä .

Answer 1

["

The following solution seems to work in similar situations ( see for example this case about decoding broken Hebrew text<\/a> ):<\/i>

("\\u00c3\\u00a4"
  .encode('latin-1')
  .decode('unicode_escape')
  .encode('latin-1')
  .decode('utf-8')
)

Answer 2

The codecs doc page states :

That means that output of the "unicode-escape" will be latin1, even if the default for python is utf-8.
So, you just need to encode back to latin1 and decode back to utf-8

mixed_string_to_be_unescaped =  '\u002Fq:85\\u002FczM"},{\"name\":\"Santé\",\"parent_name\":\"Santé'

val = codecs.decode(mixed_string_to_be_unescaped, 'unicode-escape')
val = val.encode('latin1').decode('utf-8')
print(val)

/q:85/czM"},{"name":"Santé","parent_name":"Santé

The above solution works, but to me was not clear because I didn't get why I should convert to latin-1 before the unicode_escape (discovered that was doing this automatically), neither why it was using unicode_escape in an unescaped string.