Hi Yongzhi,
I have the feeling that you're trying to send the whole function into the
template, I'd rather send only the results since it's best to execute all the
code you can in you web.py controller. Here's a minimalist example that works
here and seems good for your need:
====================== web.py main file ===================
#!/usr/bin/python
# -*- coding: utf-8 -*-
import web
urls = (
'.*', 'hello'
)
app = web.application(urls, globals())
render = web.template.render('templates')
def get_values():
return {'sensor1': 5,
'sensor2': 10,
'freespace': 453083058}
class hello:
def GET(self):
values = get_values()
return render.test(values = values)
if __name__ == "__main__":
app.run()
===========================================================
===============templates/test.html====================
$def with (values)
Hello reader, this is a test !<br/>
<br/>
sensor 1 : $values['sensor1']<br/>
sensor 2 : $values['sensor2']<br/>
free space: $values['freespace']<br/>
======================================================
I get the following result in my browser:
Hello reader, this is a test !
sensor 1 : 5
sensor 2 : 10
free space: 453083058
The function get_values() returns a dictionary containing all the values you
want into an associative array ( {key: value} ). This way seems convenient
with your question about sending seamlessly multiple values in your template
considering you'll always be able to pack new values unless you give them
another key in the dictionary.
Notice that I sent the result of the function (assigned into the values
object) but not the function itself. The values are calculated into the web.py
class then sent to the template.
In my example I give a complete dictionary at once but there are several ways
to build dictionaries. If you get values one by one, the most affordable
method might be to start with an empty one and to add the values when you get
them:
sample_dict = {}
sample_dict['data_1'] = foo_function()
sample_dict['data_2'] = bar_function()
the resulting dictionary will be somewhat like this one:
{'data_1': 'whatever foo_function() returned',
'data_2': 'whatever bar_function() returned'}
You'll be able to get the values in the dictionary by referencing them in your
template like this $sample_dict['data_1'].
More informations about dict can be found in the python documentation.
https://docs.python.org/2/library/stdtypes.html section 5.8
https://docs.python.org/2/tutorial/datastructures.html section 5.5
Hope this example helps :)
Regards,
Christophe.
Le lundi 13 juillet 2015, 16:10:09 [email protected] a écrit :
> Hi all,
>
> I want to display/update several metrics in a normal page (not in a form).
> These metrics got updated every minute and were stored in a log file. I
> prepared a function to open that log file then analyze the last several
> lines to collect them. I want these metrics got updated in every page
> load/refresh.
>
> The first method I considered is to utilize Templetor (
> http://webpy.org/docs/0.3/templetor). I used $code block in the template
> but figured out soon that this solution won't work for the security reason.
> In my function I use open which is prohibited by webpy.
>
> Then I thought of `Import functions into templates` (
> https://github.com/webpy/webpy.github.com/blob/master/cookbook/template_impo
> rt.md). In my case, there is no argument for that function. I followed the
> instruction but got the following error.
>
> checknow() takes no arguments (1 given)
>
>
> #in my application.py:
> def checknow():
> ...
> return TN_str
>
> render = web.template.render('templates/',globals={'stat':checknow})
>
> #in the template:
> $def with(checknow)
> ... ...
> <h1><div>Test: $stat(checknow)</div></h1>
>
> By the way, how to refer multiple values of the function checknow()? The
> function checknow() should return multiple values in the real case. Could
> you please help me out? Thanks a lot.
>
> Best Regards,
> -Yongzhi
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