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:
def trim_string(data):
return data
in app.py:
import tornado.ioloop
import tornado.web
import ui_methods
classMainHandler(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()
in main.html:
....
{{ trim_string('a string that is too long............')}}
....
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
)
Then in your template you call it like this:
{% my_function('some string')%}
3。import functions in Tornado. I think this is the cleanest solution. At the top of your template simply do the following:
{%import lib %}
later you can do
{{ trim_string(data)}}
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