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For example:
>>> print json.dumps('růže')
"r\u016f\u017ee"
(Of course, in the real program it's not just a single string, and it also appears like this in the file, when using json.dump()) I'd like it to output simply "růže" as well, how to do that?
902
JSON data always uses the Unicode character set. In this respect, JSON data is simpler to use than XML data. This is an important part of the JSON Data Interchange Format (RFC 4627).
In Python source code, Unicode literals are written as strings prefixed with the 'u' or 'U' character: u'abcdefghijk'. Specific code points can be written using the \u escape sequence, which is followed by four hex digits giving the code point. The \U escape sequence is similar, but expects 8 hex digits, not 4.
dumps() takes in a json object and returns a string.
JSON in HTTP are always encoded in UTF-8. Responses are parsed correctly when server writes content type header like application/json; charset=utf-8 . However, many servers (like Play framework itself) uses application/json without charset. In Play 2.6, that responses are parsed in ISO-8859-1 charset.
Pass the ensure_ascii=False argument to json.dumps:
>>> print json.dumps('růže', ensure_ascii=False)
"růže"
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