Convert Unicode string to UTF-8, and then to JSON

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Hi Developers,

I want to encode a string in UTF-8 and view the corresponding UTF-8 bytes individually. In the Python REPL the following seems to work fine:

>>> unicode('©', 'utf-8').encode('utf-8')'\xc2\xa9'

Note that I’m using U+00A9 COPYRIGHT SIGN as an example here. The '\xC2\xA9' looks close to what I want — a string consisting of two separate code points: U+00C2 and

U+00A9. (When UTF-8-decoded, it gives back the original string, '\xA9'.)

Then, I want the UTF-8-encoded string to be converted to a JSON-compatible string. However, the following doesn’t seem to do what I want:

>>> import json; json.dumps('\xc2\xa9')'"\\u00a9"'

Note that it generates a string containing U+00A9 (the original symbol). Instead, I need the UTF-8-encoded string, which would look like "\u00C2\u00A9" in valid JSON.

TL;DR How can I turn '©' into "\u00C2\u00A9" in Python? I feel like I’m missing something obvious — is there no built-in way to do this?
  1. Post:604

    Points:4228
    Re: Convert Unicode string to UTF-8, and then to JSON

    Hi Babe,

    If you really want "\u00c2\u00a9" as the output, give json an Unicode string as input.

    >>> print json.dumps(u'\xc2\xa9')"\u00c2\u00a9"

    You can generate this Unicode string from the raw bytes:

    s = unicode('©', 'utf-8').encode('utf-8')
    s2 = u''.join(unichr(ord(c)) for c in s)

    I think what you really want is "\xc2\xa9" as the output, but I'm not sure how to generate that yet.

Answer