我有一个用Python编写的应用程序，它是由相当专业的观众(科学家)使用的。
我正在寻找一个好方法，使应用程序可扩展的用户，即脚本/插件架构。
I am looking for something extremely lightweight. Most scripts, or plugins, are not going to be developed and distributed by a third-party and installed, but are going to be something whipped up by a user in a few minutes to automate a repeating task, add support for a file format, etc. So plugins should have the absolute minimum boilerplate code, and require no 'installation' other than copying to a folder (so something like setuptools entry points, or the Zope plugin architecture seems like too much.)
是否已经有类似的系统存在，或者是否有项目实现了类似的方案，我应该看看想法/灵感?
当我搜索Python Decorators时，发现了一个简单但有用的代码片段。它可能不符合你的需求，但非常鼓舞人心。
Scipy高级Python#插件注册系统
class TextProcessor(object):
PLUGINS = []
def process(self, text, plugins=()):
if plugins is ():
for plugin in self.PLUGINS:
text = plugin().process(text)
else:
for plugin in plugins:
text = plugin().process(text)
return text
@classmethod
def plugin(cls, plugin):
cls.PLUGINS.append(plugin)
return plugin
@TextProcessor.plugin
class CleanMarkdownBolds(object):
def process(self, text):
return text.replace('**', '')
用法:
processor = TextProcessor()
processed = processor.process(text="**foo bar**", plugins=(CleanMarkdownBolds, ))
processed = processor.process(text="**foo bar**")
当我搜索Python Decorators时，发现了一个简单但有用的代码片段。它可能不符合你的需求，但非常鼓舞人心。
Scipy高级Python#插件注册系统
class TextProcessor(object):
PLUGINS = []
def process(self, text, plugins=()):
if plugins is ():
for plugin in self.PLUGINS:
text = plugin().process(text)
else:
for plugin in plugins:
text = plugin().process(text)
return text
@classmethod
def plugin(cls, plugin):
cls.PLUGINS.append(plugin)
return plugin
@TextProcessor.plugin
class CleanMarkdownBolds(object):
def process(self, text):
return text.replace('**', '')
用法:
processor = TextProcessor()
processed = processor.process(text="**foo bar**", plugins=(CleanMarkdownBolds, ))
processed = processor.process(text="**foo bar**")
module_example.py:
def plugin_main(*args, **kwargs):
print args, kwargs
loader.py:
def load_plugin(name):
mod = __import__("module_%s" % name)
return mod
def call_plugin(name, *args, **kwargs):
plugin = load_plugin(name)
plugin.plugin_main(*args, **kwargs)
call_plugin("example", 1234)
它当然是“最小的”，它绝对没有错误检查，可能有无数的安全问题，它不是很灵活-但它应该告诉你一个Python插件系统可以多么简单。
你可能也想看看imp模块，尽管你可以用__import__， os。Listdir和一些字符串操作。
