tornado template调用后台 自定义python 函数

三种方法

1。defining this function in a module and passing the module to tornado.web.Application as the ui_methods argument.

in ui_methods.py:

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def trim_string(data):? ? return data[0:20]

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in app.py:

import tornado.ioloopimport tornado.webimport ui_methodsclassMainHandler(tornado.web.RequestHandler):def get(self):        self.render("main.html")urls =[(r"/",MainHandler)]application = tornado.web.Application(urls, ui_methods=ui_methods)if __name__ =="__main__":    application.listen(8888)    tornado.ioloop.IOLoop.instance().start()

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in main.html:

....{{ trim_string('a string that is too long............')}}....

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2。pass the function in as a template variable

 template_vars['mesage']='hello' template_vars['function']= my_function # Note: No ()        self.render('home.html',**template_vars        )

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Then in your template you call it like this:

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{% my_function('some string')%}

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3。import functions in Tornado. I think this is the cleanest solution. At the top of your template simply do the following:

{%import lib %}

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