Python学习笔记之解析json的方法分析
[tr][/tr]本文实例讲述了Python解析json的方法。分享给大家供大家参考,具体如下:
刚学习到Python中解析json的方法,觉得有必要在这里坐下笔记。
我是在python的内部环境中看的
Encoding basic Python object hierarchies
>>> import json>>> json.dumps(['foo', {'bar': ('baz', None, 1.0, 2)}])'["foo", {"bar": ["baz", null, 1.0, 2]}]'>>> print json.dumps("\"foo\bar")"\"foo\bar">>> print json.dumps(u'\u1234')"\u1234">>> print json.dumps('\\')"\\">>> print json.dumps({"c": 0, "b": 0, "a": 0}, sort_keys=True){"a": 0, "b": 0, "c": 0}>>> from StringIO import StringIO>>> io = StringIO()>>> json.dump(['streaming API'], io)>>> io.getvalue()'["streaming API"]'
Compact encoding::
>>> import json>>> json.dumps([1,2,3,{'4': 5, '6': 7}], sort_keys=True, separators=(',',':'))'[1,2,3,{"4":5,"6":7}]'Pretty printing::>>> import json>>> print json.dumps({'4': 5, '6': 7}, sort_keys=True, indent=4, separators=(',', ': ')){ "4": 5, "6": 7}
Decoding JSON::
>>> import json>>> obj = [u'foo', {u'bar': [u'baz', None, 1.0, 2]}]>>> json.loads('["foo", {"bar":["baz", null, 1.0, 2]}]') == objTrue>>> json.loads('"\\"foo\\bar"') == u'"foo\x08ar'True>>> from StringIO import StringIO>>> io = StringIO('["streaming API"]')>>> json.load(io)[0] == 'streaming API'True
Specializing JSON object decoding::
>>> import json>>> def as_complex(dct): if '__complex__' in dct: return complex(dct['real'], dct['imag']) return dct>>> json.loads('{"__complex__": true, "real": 1, "imag": 2}', object_hook=as_complex)(1+2j)>>> from decimal import Decimal>>> json.loads('1.1', parse_float=Decimal) == Decimal('1.1')True
Specializing JSON object encoding::
>>> import json>>> def encode_complex(obj): if isinstance(obj, complex): return [obj.real, obj.imag] raise TypeError(repr(o) + " is not JSON serializable")>>> json.dumps(2 + 1j, default=encode_complex)'[2.0, 1.0]'>>> json.JSONEncoder(default=encode_complex).encode(2 + 1j)'[2.0, 1.0]'>>> ''.join(json.JSONEncoder(default=encode_complex).iterencode(2 + 1j))'[2.0, 1.0]'
或者也可以去看官方文档,自己能学到东西才是真的