Ultra fast JSON encoder and decoder for Python
Project description
This is a compatibility fork of ultrajson 1.35 that is intended to coexist with newer versions by renaming the c extension to “ujson1”.
Development on mainline ultrajson 3.x has reumed in https://github.com/ultrajson/ultrajson and please send pull requests there unless they are absolutely necessary to get you OFF of 1.x.
UltraJSON is an ultra fast JSON encoder and decoder written in pure C with bindings for Python 2.5+ and 3.
For a more painless day to day C/C++ JSON decoder experience please checkout ujson4c, based on UltraJSON.
To install it just run Pip as usual:
$ pip install ujson
Usage
May be used as a drop in replacement for most other JSON parsers for Python:
>>> import ujson
>>> ujson.dumps([{"key": "value"}, 81, True])
'[{"key":"value"},81,true]'
>>> ujson.loads("""[{"key": "value"}, 81, true]""")
[{u'key': u'value'}, 81, True]
Encoder options
encode_html_chars
Used to enable special encoding of “unsafe” HTML characters into safer Unicode sequences. Default is false:
>>> ujson.dumps("<script>John&Doe", encode_html_chars=True)
'"\\u003cscript\\u003eJohn\\u0026Doe"'
ensure_ascii
Limits output to ASCII and escapes all extended characters above 127. Default is true. If your end format supports UTF-8 setting this option to false is highly recommended to save space:
>>> ujson.dumps(u"\xe5\xe4\xf6") '"\\u00e5\\u00e4\\u00f6"' >>> ujson.dumps(u"\xe5\xe4\xf6", ensure_ascii=False) '"\xc3\xa5\xc3\xa4\xc3\xb6"'
double_precision
Controls how many decimals to encode for double or decimal values. Default is 9:
>>> ujson.dumps(math.pi) '3.1415926536' >>> ujson.dumps(math.pi, double_precision=1) '3.1' >>> ujson.dumps(math.pi, double_precision=0) '3' >>> ujson.dumps(math.pi, double_precision=4) '3.1416'
escape_forward_slashes
Controls whether forward slashes (/) are escaped. Default is True:
>>> ujson.dumps("http://esn.me")
'"http:\/\/esn.me"'
>>> ujson.dumps("http://esn.me", escape_forward_slashes=False)
'"http://esn.me"'
indent
Controls whether indention (“pretty output”) is enabled. Default is 0 (disabled):
>>> ujson.dumps({"foo": "bar"})
'{"foo":"bar"}'
>>> ujson.dumps({"foo": "bar"}, indent=4)
{
"foo":"bar"
}
Decoders options
precise_float
Set to enable usage of higher precision (strtod) function when decoding string to double values. Default is to use fast but less precise builtin functionality:
>>> ujson.loads("4.56")
4.5600000000000005
>>> ujson.loads("4.56", precise_float=True)
4.5599999999999996
Test machine:
Linux 3.13.0-66-generic x86_64 #108-Ubuntu SMP Wed Oct 7 15:20:27 UTC 2015
Versions:
CPython 2.7.6 (default, Jun 22 2015, 17:58:13) [GCC 4.8.2]
blist : 1.3.6
simplejson: 3.8.1
ujson : 1.34 (0c52200eb4e2d97e548a765d5f089858c41967b0)
yajl : 0.3.5
ujson |
yajl |
simplejson |
json |
|
|---|---|---|---|---|
Array with 256 doubles |
||||
encode |
3508.19 |
5742.00 |
3232.38 |
3309.09 |
decode |
25103.37 |
11257.83 |
11696.26 |
11871.04 |
Array with 256 UTF-8 strings |
||||
encode |
3189.71 |
2717.14 |
2006.38 |
2961.72 |
decode |
1354.94 |
630.54 |
356.35 |
344.05 |
Array with 256 strings |
||||
encode |
18127.47 |
12537.39 |
12541.23 |
20001.00 |
decode |
23264.70 |
12788.85 |
25427.88 |
9352.36 |
Medium complex object |
||||
encode |
10519.38 |
5021.29 |
3686.86 |
4643.47 |
decode |
9676.53 |
5326.79 |
8515.77 |
3017.30 |
Array with 256 True values |
||||
encode |
105998.03 |
102067.28 |
44758.51 |
60424.80 |
decode |
163869.96 |
78341.57 |
110859.36 |
115013.90 |
Array with 256 dict{string, int} pairs |
||||
encode |
13471.32 |
12109.09 |
3876.40 |
8833.92 |
decode |
16890.63 |
8946.07 |
12218.55 |
3350.72 |
Dict with 256 arrays with 256 dict{string, int} pairs |
||||
encode |
50.25 |
46.45 |
13.82 |
29.28 |
decode |
33.27 |
22.10 |
27.91 |
10.43 |
Dict with 256 arrays with 256 dict{string, int} pairs, outputting sorted keys |
||||
encode |
27.19 |
7.75 |
2.39 |
|
Complex object |
||||
encode |
577.98 |
387.81 |
470.02 |
|
decode |
496.73 |
234.44 |
151.00 |
145.16 |
Versions:
CPython 3.4.3 (default, Oct 14 2015, 20:28:29) [GCC 4.8.4]
blist : 1.3.6
simplejson: 3.8.1
ujson : 1.34 (0c52200eb4e2d97e548a765d5f089858c41967b0)
yajl : 0.3.5
ujson |
yajl |
simplejson |
json |
|
|---|---|---|---|---|
Array with 256 doubles |
||||
encode |
3477.15 |
5732.24 |
3016.76 |
3071.99 |
decode |
23625.20 |
9731.45 |
9501.57 |
9901.92 |
Array with 256 UTF-8 strings |
||||
encode |
1995.89 |
2151.61 |
1771.98 |
1817.20 |
decode |
1425.04 |
625.38 |
327.14 |
305.95 |
Array with 256 strings |
||||
encode |
25461.75 |
12188.64 |
13054.76 |
14429.81 |
decode |
21981.31 |
17014.22 |
23869.48 |
22483.58 |
Medium complex object |
||||
encode |
10821.46 |
4837.04 |
3114.04 |
4254.46 |
decode |
7887.77 |
5126.67 |
4934.60 |
6204.97 |
Array with 256 True values |
||||
encode |
100452.86 |
94639.42 |
46657.63 |
60358.63 |
decode |
148312.69 |
75485.90 |
88434.91 |
116395.51 |
Array with 256 dict{string, int} pairs |
||||
encode |
11698.13 |
8886.96 |
3043.69 |
6302.35 |
decode |
10686.40 |
7061.77 |
5646.80 |
7702.29 |
Dict with 256 arrays with 256 dict{string, int} pairs |
||||
encode |
44.26 |
34.43 |
10.40 |
21.97 |
decode |
28.46 |
23.95 |
18.70 |
22.83 |
Dict with 256 arrays with 256 dict{string, int} pairs, outputting sorted keys |
||||
encode |
33.60 |
6.94 |
22.34 |
|
Complex object |
||||
encode |
432.30 |
351.47 |
379.34 |
|
decode |
434.40 |
221.97 |
149.57 |
147.79 |
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
File details
Details for the file ujson1-1.36.tar.gz.
File metadata
- Download URL: ujson1-1.36.tar.gz
- Upload date:
- Size: 189.8 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/3.2.0 pkginfo/1.5.0.1 requests/2.24.0 setuptools/47.3.1 requests-toolbelt/0.9.1 tqdm/4.48.2 CPython/3.8.3
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | 00792db47b0bad1edd680c72f3f5c101db0b861d64b506ce9629aa0758246e01 |
|
| MD5 | d95f913c2ece239cbda0c56454ee02e5 |
|
| BLAKE2b-256 | fc214f49e23bb0a7d38f077dbdced7012a1ea0e66e5929abac7139f397587ace |
