Nanorm : A simple ORM of Python
=========================================
这是一个精简的Python ORM框架。旨在于用一个文件写出ORM，提供开发小型或微型项目时的一些基本功能。
为什么要使用nanorm？
-------------------
当你的项目足够小，以至于不想与其他的多余库产生依赖关系，但是你又需要使用一些简单的ORM功能（SQLAlchemy对你来说过于庞大），这时你就可以选择Nanorm。它只有一个py文件，直接把它放在你的项目目录下就行，你甚至可以把它嵌入在你的源代码中。
为什么只支持sqlite3？
--------------------
这个ORM的目的只在于解决一些小微项目的需求，sqlite3对于小微项目来说是很好的选择。因为在Python标准库中就有对sqlite3的支持，不需要像使用mysql时那样另外安装mysqldb库。另一方面，你也不用在你的电脑或服务器上安装数据库服务，大多数windows和unix的操作系统都自带了sqlite3的支持。我们的目的就是精简，极简。
如何使用？
---------
安装：
```
pip install nanorm
```
下面是一个最简单的例子
```python
from nanorm import *
set_db_name("example.db")
class User(Model):
name = CharField()
age = IntegerField(default=20)
sex = BooleanField()
s1 = User()
s1.name = "Joe"
s1.age = 45
s1.sex = True
s1.save()
joe = User.get(age=45)
print(joe)
```
具体的高级功能和用法可参照 `nanorm_example.py` 文件中各场景的用例
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