使数据可导入
autocompvar的Python项目详细描述
欢迎使用autocompvar文档
在大多数情况下，在代码中输入常量值。因为当你看到价值的时候，你不知道它背后的含义。更好的方法是定义一个常量，并使用该常量变量。
但有时，你有大量的常量，你需要把它放在你的代码中的任何地方。很难记住所有的常量名称。尤其是，有时它们是嵌套的。
autocompvar允许开发人员从数据创建一个常量def脚本，然后就不需要再记住任何东西了。
快速链接
示例
假设你有一个RPG游戏。你需要编写一些应用程序来使用项目id查询数据，但要记住什么是什么！如果您只是使用常量，那么您的代码是不可维护的！
ItemType
|--- Weapon: subclass_id=1, name=weapon
|--- Sword: id=1, name=sword
|--- Dagger: id=2, name=dagger
|--- Armor: subclass_id=2, name=armor
|--- Plate: id=1, name=plate
|--- Cloth: id=2, name=cloth理想情况下，您需要这个：
# define your constant here>>>fromitemtypeimportitemtype# when you type itemtype.name, it gives you all available subclass# when you type itemtype.name____weapon, it gives you all attributes>>>itemtype.name____weapon.subclass_id1>>>itemtype.name____weapon.name____dagger.id2# or you can use a function interface to program that>>>itemtype.name____armor.getattr_by_id(2).namecloth
实际代码
（代码示例可以在：https://github.com/MacHu-GWU/autocompvar-project/blob/master/example.py）找到
首先，导入autocompvar，准备数据并生成代码。
#!/usr/bin/env python# -*- coding: utf-8 -*-from__future__importprint_functionfromautocompvar.metadataimportgen_code# classname# attrs: all attributes you need to define# keys: indexable attributes, like int, string field that are unique# data: the data to create instance of this class# collection: subclass listdata={"classname":"ItemType","attrs":[],"collection":[{"classname":"SubClass","attrs":["id","name"],"keys":["name"],"data":{"id":1,"name":"weapon"},"collection":[{"classname":"Weapon","attrs":["id","name"],"keys":["name"],"data":{"id":1,"name":"sword"},},{"classname":"Weapon","attrs":["id","name"],"keys":["name"],"data":{"id":2,"name":"dagger"},},],},{"classname":"SubClass","attrs":["id","name"],"keys":["name"],"data":{"id":2,"name":"armor"},"collection":[{"classname":"Armor","attrs":["id","name"],"keys":["name"],"data":{"id":1,"name":"plate"},},{"classname":"Armor","attrs":["id","name"],"keys":["name"],"data":{"id":2,"name":"armor"},},],},],}code=gen_code(data)print(code)
然后您有一个可导入的脚本，它可以执行from your_module import item_type：
#!/usr/bin/env python# -*- coding: utf-8 -*-fromautocompvar.baseimportBaseclassItemType(Base):__attrs__=[]__keys__=[]def__init__(self):passclassSubClass(Base):__attrs__=['id','name']__keys__=['name']def__init__(self,id=None,name=None):self.id=idself.name=nameclassWeapon(Base):__attrs__=['id','name']__keys__=['name']def__init__(self,id=None,name=None):self.id=idself.name=nameclassArmor(Base):__attrs__=['id','name']__keys__=['name']def__init__(self,id=None,name=None):self.id=idself.name=nameitem_type=ItemType()sub_class_name_weapon=SubClass(name='weapon',id=1)weapon_name_sword=Weapon(name='sword',id=1)sub_class_name_weapon.name____sword=weapon_name_swordweapon_name_dagger=Weapon(name='dagger',id=2)sub_class_name_weapon.name____dagger=weapon_name_daggeritem_type.name____weapon=sub_class_name_weaponsub_class_name_armor=SubClass(name='armor',id=2)armor_name_plate=Armor(name='plate',id=1)sub_class_name_armor.name____plate=armor_name_platearmor_name_armor=Armor(name='armor',id=2)sub_class_name_armor.name____armor=armor_name_armoritem_type.name____armor=sub_class_name_armor
现在您可以轻松地使用这样的任何常数：
>>>print(item_type.name____weapon.name____sword.id)1>>>print(item_type.name____armor.name____cloth.name)cloth
安装
autocompvar在pypi上发布，所以您只需要：
$ pip install autocompvar
要升级到最新版本：
$ pip install --upgrade autocompvar
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