[issue4136] merge json library with latest simplejson 2.0.x

[Martin v. Löwis]

Martin v. Löwis <martin at v.loewis.de> added the comment:

The one thing that IMO needs to be decided before this can be accept is
the version compatibility: what Python versions must this code stay
compatible with? That decision then needs to be implemented.

Apart from this (and the additional minor comments below), the patch
looks fine.

http://codereview.appspot.com/20095/diff/1/13
File Lib/json/decoder.py (right):

http://codereview.appspot.com/20095/diff/1/13#newcode21
Line 21: nan, inf = struct.unpack('dd', _BYTES)
I think this can be simplified as

   nan, inf = struct.unpack('>dd', _BYTES)

http://codereview.appspot.com/20095/diff/1/12
File Lib/json/encoder.py (right):

http://codereview.appspot.com/20095/diff/1/12#newcode31
Line 31: INFINITY = float('1e66666')
Why not decoder.PosInf?

http://codereview.appspot.com/20095/diff/1/14
File Modules/_json.c (right):

http://codereview.appspot.com/20095/diff/1/14#newcode3
Line 3: #if PY_VERSION_HEX < 0x02060000 && !defined(Py_TYPE)
Is Python before 2.6 even supported anymore? ISTM that the usage of
.format on strings outrules Python2.5 and earlier.

http://codereview.appspot.com/20095

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