利用setuptools的entry_point参数实现模块动态导入

setuptools提供了entry_points参数，允许在安装时，动态导入模块. 下面是简单示例.

目录结构

建立如下文件

➜  book  tree
.
├── book
│   ├── add.py
│   ├── __init__.py
│   ├── remove.py
│   └── update.py
└── setup.py

add.py内容

remove.py、update.py与add.py相同

def make():
print "add"

setup.py内容

from setuptools import setup, find_packages

setup(
name = "book",
version = "0.1",
packages = find_packages(),
entry_points={
"book":[
"add=book.add:make",  #add=模块:函数/类
"update=book.update:make",
"remove=book.remove:make",
]
}
)

编译成egg包

python setup.py bdist_egg

安装到系统路径

上面编译命令可以不用，直接用install安装

python setup.py install

用法

from pkg_resources import iter_entry_points

for r in iter_entry_points("book"):
m = r.load()
m()