How to link html and Python object ?

[Nicolas Pinault]

Hi,

Say, I have a class MyClass() which creates a DIV and adds this DIV to
document :

class MyClass() :
def __init__(self) :
d = html.DIV(id='myid')
document <= d

mc = Myclass()

In another place, I can get access to the DIV with document["myid"].
I there another way to get access to the DIV ? I mean, do I have to set
an id to get access to it ?
I want to get access to mc but I have no reference to it.
How can I get access to mc ? Can I set an attribute to the DIV which is
a reference to mc ?

Nicolas

[Kiko]

Look here:
http://jsfiddle.net/9m1gdeds/

In the first script I use an id that can be used to import the script in the second script

Docs: http://brython.info/static_doc/en/import.html

Nicolas

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[Nicolas Pinault]

Hi Kiko,

Le 22/05/2016 à 22:55, Kiko a écrit :

Look here:
http://jsfiddle.net/9m1gdeds/

This is not what I want to achieve.
In my case, I have a single script with many modules.

Ideally, I would be able to attach a Brython object to a html element.
Something like :
module 1 :
import module2

class MyClass() :
    def __init__(self) :
        d = html.DIV(id='myid')

        d.brython_obj = self        # <--------- javascript object has an attribute referencing Brython object

        document <= d

mc = Myclass()

module2.dosomething()

module 2 :
def dosomething():
    mc = document["myid"].brython_obj
    mc.d.text += ' Added text.'

You will say I just have to pass mc as an argument to dosomething(). But for some reason, I don't want to (my actual application is much more complex).

To view this discussion on the web visit https://groups.google.com/d/msgid/brython/CAB-sx62QhFxKnbUYyVE5H2-XP19rOkjd1BVL6hNcoPCBOQqxEw%40mail.gmail.com.

[Kiko]

2016-05-23 19:06 GMT+02:00 Nicolas Pinault <d...@famillepinault.fr>:

Hi Kiko,

Le 22/05/2016 à 22:55, Kiko a écrit :

Look here:
http://jsfiddle.net/9m1gdeds/

This is not what I want to achieve.
In my case, I have a single script with many modules.

Ideally, I would be able to attach a Brython object to a html element.
Something like :
module 1 :
import module2
class MyClass() :
    def __init__(self) :
        d = html.DIV(id='myid')
        d.brython_obj = self        # <--------- javascript object has an attribute referencing Brython object
        document <= d

mc = Myclass()
module2.dosomething()

module 2 :
def dosomething():
    mc = document["myid"].brython_obj
    mc.d.text += ' Added text.'

You will say I just have to pass mc as an argument to dosomething(). But for some reason, I don't want to (my actual application is much more complex).

I think you can't attach an object to a dom element (nor Brython neither javascript) . You can try to serialize your object (e.g., json) and then de-serialize and eval again the object but I think this way and what you want to do is not very natural. Maybe, if you explain a little bit better what you want to do with a more complete example we can try to help.

 

To view this discussion on the web visit https://groups.google.com/d/msgid/brython/2acb6af4-fb19-dc02-4194-96bbcc7487a3%40famillepinault.fr.

[Nicolas Pinault]

Never mind, I found another way to do what I want.
Thanks for your help.

To view this discussion on the web visit https://groups.google.com/d/msgid/brython/CAB-sx61kYwp%3Df0W%3DQxs6M3NFkBNoUpXCMMX1Z4-7mem%3D3fD-%3Dw%40mail.gmail.com.

[Pierre Quentel]

You can actually set arbitrary attributes to DOM Nodes. This works perfectly :

<script type="text/python">
from browser import document, html

import module2

class MyClass:

    def __init__(self):
        self.d = d = html.DIV("essai", id="myid")
        d.attr = self
        document <= d

mc = MyClass()

module2.do_something()
</script>


where module2.py is

from browser import document

def do_something():
    mc = document['myid'].attr
    mc.d.text += " ok"

The only difference with your script is that you didn't set an attribute d to the instance of MyClass.

[Nicolas Pinault]

Great ! That's perfect.

Is it also applicable to generated events ?
evt = DOMEvent(evt_name)
evt.attr = my_obj
element.dispatchEvent(evt)

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