trac代码阅读3 - upgrade database

重写IEnvironmentSetupParticipant中的三个方法, 然后记得在__init__.py中import 你的IEnvironmentSetupParticipant实现, 此时安装并启用插件之后, 就会出现: trac-admin /path/to/trac upgrade的提示

trac代码阅读2 - yield expressions

例:

def test(value = None):

    i = value or 0

    while i < 100:

        yield i

        i += 1

=============>>>>>

>>> s.next()

0

>>> s.next()

1

>>> s.next()

2

>>> s.next()

3

由外部逻辑控制此generator function的执行,  we called it: Semi-Coroutine

trac代码阅读1

http://trac.edgewall.org/browser/trunk/trac/web/href.py

Highlights:

__call__
__getattr__
doctest