[issue10038] Returntype of json.loads() on strings

2010-10-06 Thread Nik Tautenhahn 

New submission from Nik Tautenhahn :

Hi,

before 2.7, an
import json
json.loads('"abc"')

yielded u"abc".

in 2.7 I get
"abc" (a byte string).

I would have expected an entry in "news" or "What's new in 2.7" why this change 
happened. In addition, all examples at http://docs.python.org/library/json are 
wrong for Python 2.7  if json.loads is involved.

Any insight on this?

best regards,
Nik

--
assignee: d...@python
components: Documentation, Library (Lib)
messages: 118069
nosy: d...@python, llnik
priority: normal
severity: normal
status: open
title: Returntype of json.loads() on strings
type: behavior
versions: Python 2.7

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[issue10038] Returntype of json.loads() on strings

2010-10-06 Thread Nik Tautenhahn 

Nik Tautenhahn  added the comment:

Well, Ok, if I take bob's comment from the simplejson Issue, I can understand 
that some people want byte strings. But then I would like to have something 
like a "parse_str" hook, to enhance my json-Decoder or maybe a keyword argument 
for the default json-Decoder...

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[issue10038] Returntype of json.loads() on strings

2010-10-07 Thread Nik Tautenhahn 

Nik Tautenhahn  added the comment:

Well, then at least the documentation and the "What's changed" need to be 
updated. Furthermore, if such decisions are made, it would be at least nice to 
have some general "decode-hook" for json.JSONDecoder - the "object_hook" is 
only used for dict-objects - why is there no hook for strings or a general hook 
which is used on any objects?

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[issue10038] Returntype of json.loads() on strings

2010-10-07 Thread Nik Tautenhahn 

Nik Tautenhahn  added the comment:

Yep, the solution should not be "maybe it's str, maybe it's unicode" - I mean, 
if the decoder gives you a str if there are no fancy characters and unicode if 
it contains some, this might lead to some confusion... And yes, in my opinion, 
this is a bug, too.

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[issue10038] json.loads() on str should return unicode, not str

2010-11-02 Thread Nik Tautenhahn 

Nik Tautenhahn  added the comment:

There is even more inconsistency here.

As already mentioned, we have this:


>>> import json
>>> json.loads(json.dumps("abc"))

'abc'

If, however, I am evil and hide _json.so (which is the C-part of the json 
module for speedup), the JSON code falls back to its python implementation and 
voila:

>>> import json
>>> json.loads(json.dumps("abc"))

u'abc'

Not so neat, if your fallback is not a fallback but shows such different 
behaviour.

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