1、常用json库主要有json-py和simplejson
1) json-py 包含json和minjson,用法一样
Python 2.4.3 (#1, Jan 9 2013, 06:47:03) [GCC 4.1.2 20080704 (Red Hat 4.1.2-54)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import json >>> import minjson >>> a = {'a':5, 'b':4} >>> b = json.write(a) >>> c = json.read(b) >>> a {'a': 5, 'b': 4} >>> b '{"a":5,"b":4}' >>> c {'a': 5, 'b': 4} >>> d = minjson.write(a) >>> e = minjson.read(d) >>> d '{"a": 5, "b": 4}' >>> e {'a': 5, 'b': 4} >>>
2) simplejson
# python 2.6以上: import json json.loads(js_obj) json.dumps(py_obj) # python 2.6以下: import simplejson as json json.loads(js_obj) json.dumps(py_obj)
2、安装simplejson
python2.6以上内置json解释库,是 smiplejson,python2.6以下没有内置的json,要手动安装。下载地址是 https://pypi.python.org/packages/source/s/simplejson/simplejson-2.0.9.tar.gz。如果下载太慢可使用pypi豆瓣源
[root@LuGu_10_1_80_198 py]# cd simplejson-2.0.9 [root@LuGu_10_1_80_198 simplejson-2.0.9]# /usr/bin/python2.4 setup.py install [root@LuGu_10_1_80_198 simplejson-2.0.9]# /usr/bin/python2.4 Python 2.4.3 (#1, Jan 9 2013, 06:47:03) [GCC 4.1.2 20080704 (Red Hat 4.1.2-54)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import simplejson as json >>> a = {'a': 5, 'b': 4} >>> b = json.dumps(a) >>> b '{"a": 5, "b": 4}' >>> c = json.loads(b) >>> c {u'a': 5, u'b': 4} >>> type(c) <type 'dict'> >>> type(b) <type 'str'> >>>
3、安装脚本 install_simplejson.sh
#!/bin/bash cat >/usr/local/src/test.py <<EOF #!/usr/bin/python import sys try: import json except ImportError: try: import simplejson as json except ImportError: sys.exit(1) sys.exit(0) EOF /usr/bin/python /usr/local/src/test.py &>/dev/null if [ $? -eq 0 ];then echo "json or simplejson have installed" exit 0 fi # json="json-py-3_4.zip" # python 2.6之前需要安装simplejson 2.6和之后内置json simplejson="simplejson-2.0.9.tar.gz" setuptool="setuptools-0.6c7-py2.4.egg" rsync -arv rsync://root@10.1.17.217/upload/simplejson-forpy /usr/local/src &>/dev/null cd /usr/local/src/simplejson-forpy tar -xf ${simplejson} && softwaredir=`echo ${simplejson} | sed 's/.tar.gz//g'` mv ${setuptool} ${softwaredir} && cd ${softwaredir} /usr/bin/python setup.py install >/dev/null 2>&1 cd /usr/local/src && rm -rf simplejson-forpy /usr/bin/python /usr/local/src/test.py &>/dev/null if [ $? -eq 0 ];then rm -rf /usr/local/src/test.py echo "Python simplejson Install OK" && exit 0 else rm -rf /usr/local/src/test.py echo "python simplejson Install OK" && exit 1 fi
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