lindh-jsonobject 1.3.3

简介

使用lindh.jsonobject的目的是提供序列化和 将python3对象反序列化为json和从json反序列化python3对象，以便它们可以进行通信 与其他应用程序一起存储到文档数据库中，如couchdb。

一些代码和灵感来自django项目，对象的行为 很像这样。然而，尽管django对象是针对关系数据库的， 这些对象用于文档数据库中的复杂对象。

依赖性

除了核心python3.6之外，没有其他依赖项

安装

此存储库可以使用pip安装。

pip install lindh-jsonobject

示例

>>>fromjsonimportdumps>>>fromlindh.jsonobjectimportProperty,PropertySet,EnumProperty>>>classWheel(PropertySet):...diameter=Property(float,default=1.)>>>classRating(EnumProperty):...ok='ok'...bad='bad'...good='good'>>>classCar(PropertySet):...wheels=Property(type=Wheel,is_list=True)...brand=Property()...model=Property()...rating=Property(enum=Rating,default=Rating.ok)>>>volvo=Car(brand='Volvo',model='V70',rating=Rating.good)>>>print(volvo.to_json()){"*schema":"Car","brand":"Volvo","model":"V70","rating":"good","wheels":[]}>>>volvo.wheels.append(Wheel(diameter=2.))>>>print(volvo.to_json()){"*schema":"Car","brand":"Volvo","model":"V70","rating":"good","wheels":[{"*schema":"Wheel","diameter":2.0}]}>>>volvo.wheels.append(Wheel(diameter=2.))>>>print(volvo.to_json()){"*schema":"Car","brand":"Volvo","model":"V70","rating":"good","wheels":[{"*schema":"Wheel","diameter":2.0},{"*schema":"Wheel","diameter":2.0}]}>>>volvo.wheels.append(Wheel(diameter=2.))>>>volvo.wheels.append(Wheel())# using default value here>>>print(volvo.to_json()){"*schema":"Car","brand":"Volvo","model":"V70","rating":"good","wheels":[{"*schema":"Wheel","diameter":2.0},{"*schema":"Wheel","diameter":2.0},{"*schema":"Wheel","diameter":2.0},{"*schema":"Wheel","diameter":1.0}]}>>>volvo2=Car.FromJSON(volvo.to_json())>>>print(volvo2.to_json()){"*schema":"Car","brand":"Volvo","model":"V70","rating":"good","wheels":[{"*schema":"Wheel","diameter":2.0},{"*schema":"Wheel","diameter":2.0},{"*schema":"Wheel","diameter":2.0},{"*schema":"Wheel","diameter":1.0}]}

类型提示

如果可用，还可以使用类型提示为属性指定类型：

>>>fromjsonimportdumps>>>fromtypingimportList>>>fromlindh.jsonobjectimportProperty,PropertySet,EnumProperty>>>classWheel(PropertySet):...diameter:float=Property(default=1.)>>>classRating(EnumProperty):...ok='ok'...bad='bad'...good='good'>>>classCar(PropertySet):...wheels:List[Wheel]=Property()...brand=Property()...model=Property()...rating:Rating=Property(default=Rating.ok)>>>volvo=Car(brand='Volvo',model='V90',rating=Rating.good,wheels=[])>>>volvo.wheels.append(Wheel(diameter=3.))>>>print(volvo.to_json()){"*schema":"Car","brand":"Volvo","model":"V90","rating":"good","wheels":[{"*schema":"Wheel","diameter":3.0}]}

支持的类型：

• ^{tt3}$
• ^{tt4}$
• ^{tt5}$
• ^{tt6}$
• ^{tt7}$
• ^{tt8}$ where ^{tt9}$ is a subclass of ^{tt10}$
• ^{tt9}$ where ^{tt9}$ is a subclass of EnumProperty

无模式

还有一个“无模式”模式，可以在下面找到 lindh.jsonobject.noschema。其目的是提供一个易于使用的只读 类似linq的方式来探索类似json的文件。下面是一个小例子：

>>>fromlindh.jsonobjectimportDictionary>>>d=Dictionary.load('tests/test.json')>>>palle=(d.drivers....where(lambdax:x.name=="Palle Kuling")....join(d.cars,lambdadriver,car:driver.car_brand==car.brandanddriver.car_model==car.model)....single())>>>palle.rating'good'

您还可以使用链式方法，如select(expr)、first()和extend(**items)。

作者

lindh.jsonobject由johan egneblad<；johan@egneblad.se>；编写和维护。