Styjun

Dobbs Murder Mystery : A Picture worth 1000 words?

Will this creature from Curse of Strahd reappear after being banished?

Translation of ει μη

Why were contact sensors put on three of the Lunar Module's four legs? Did they ever bend and stick out sideways?

What container to use to store developer concentrate?

Telling manager project isn't worth the effort?

Dual-national, returning to US the day the US Passport expires; can he check in with airline on Dutch passport but reenter with expiring US passport?

Why did some Apollo missions carry a grenade launcher?

Why didn’t Christianity spread southwards from Ethiopia in the Middle Ages?

ECDSA: Why is SigningKey shorter than VerifyingKey

Do 3/8 (37.5%) of Quadratics Have No x-Intercepts?

Japanese reading of an integer

Why is it "on the inside" and not "in the inside"?

How can Paypal know my card is being used in another account?

Why did Windows 95 crash the whole system but newer Windows only crashed programs?

Name These Animals

Why does the Rust compiler not optimize code assuming that two mutable references cannot alias?

How could Nomadic scholars effectively memorize libraries worth of information

Sci-fi change: Too much or Not enough

Is there an antonym for "spicy" or "hot" regarding food?

What are the cons of stateless password generators?

Incrementing add under condition in pandas

2 weeks and a tight budget to prepare for Z-day. How long can I hunker down?

Are the named pipe created by `mknod` and the FIFO created by `mkfifo` equivalent?

How to use a toggle button with a callback (in an class) in PyViz?

How to merge two dictionaries in a single expression?How do I check if a list is empty?Are static class variables possible in Python?How do I check whether a file exists without exceptions?How can I safely create a nested directory?How can I make a time delay in Python?How do I sort a dictionary by value?How to make a chain of function decorators?How to make a flat list out of list of listsHow do I list all files of a directory?

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

0

1

I am using PyViz / Panel in a notebook. Now I want to use a toggle button inside a class, and bind a callback to it.

This code - outside a class - is working:

import panel as pn
import panel.widgets as pnw
pn.extension()

toggle = pn.widgets.Toggle(name='Toggle')

def callback(*events):
 if toggle.active is True: toggle.name = 'Active'
 else: toggle.name = 'Toggle'

watcher = toggle.param.watch(callback, 'active')
toggle.param.set_param(active=False)
toggle.param.trigger('active')

pn.Row(toggle)

It produces a toggle button, and when clicked, the text changes.

No I tried to put everything inside a class definition:

class ToggleInClass():
 def __init__(self):
 self.toggle = pn.widgets.Toggle(name='Toggle')
 self.watcher = self.toggle.param.watch(callback, 'active')
 self.toggle.param.set_param(active=False)
 self.toggle.param.trigger('active')

 def callback(self, *events):
 if toggle.active is True: toggle.name = 'Active'
 else: toggle.name = 'Toggle'

toggle_in_class = ToggleInClass()
pn.Row(toggle_in_class.toggle)

Again a button is produced, but this time the callback does not seem to work: The text never changes.

The watcher seems to be ok:
toggle_in_class.watcher gives Watcher(inst=Toggle(), cls=<class 'panel.widgets.Toggle'>, fn=<function callback at 0x000001EC8419E510>, mode='args', onlychanged=True, parameter_names=('active',)).

The output of toggle_in_class.toggle.active alternates according the toggle state.

What is wrong with my callback / class definition?

python widget pyviz

share|improve this question

asked Mar 26 at 19:18

mdkmdk

10811 silver badge66 bronze badges

add a comment | 

0

1

I am using PyViz / Panel in a notebook. Now I want to use a toggle button inside a class, and bind a callback to it.

This code - outside a class - is working:

import panel as pn
import panel.widgets as pnw
pn.extension()

toggle = pn.widgets.Toggle(name='Toggle')

def callback(*events):
 if toggle.active is True: toggle.name = 'Active'
 else: toggle.name = 'Toggle'

watcher = toggle.param.watch(callback, 'active')
toggle.param.set_param(active=False)
toggle.param.trigger('active')

pn.Row(toggle)

It produces a toggle button, and when clicked, the text changes.

No I tried to put everything inside a class definition:

class ToggleInClass():
 def __init__(self):
 self.toggle = pn.widgets.Toggle(name='Toggle')
 self.watcher = self.toggle.param.watch(callback, 'active')
 self.toggle.param.set_param(active=False)
 self.toggle.param.trigger('active')

 def callback(self, *events):
 if toggle.active is True: toggle.name = 'Active'
 else: toggle.name = 'Toggle'

toggle_in_class = ToggleInClass()
pn.Row(toggle_in_class.toggle)

Again a button is produced, but this time the callback does not seem to work: The text never changes.

The watcher seems to be ok:
toggle_in_class.watcher gives Watcher(inst=Toggle(), cls=<class 'panel.widgets.Toggle'>, fn=<function callback at 0x000001EC8419E510>, mode='args', onlychanged=True, parameter_names=('active',)).

The output of toggle_in_class.toggle.active alternates according the toggle state.

What is wrong with my callback / class definition?

python widget pyviz

share|improve this question

asked Mar 26 at 19:18

mdkmdk

10811 silver badge66 bronze badges

add a comment | 

I am using PyViz / Panel in a notebook. Now I want to use a toggle button inside a class, and bind a callback to it.

This code - outside a class - is working:

import panel as pn
import panel.widgets as pnw
pn.extension()

toggle = pn.widgets.Toggle(name='Toggle')

def callback(*events):
 if toggle.active is True: toggle.name = 'Active'
 else: toggle.name = 'Toggle'

watcher = toggle.param.watch(callback, 'active')
toggle.param.set_param(active=False)
toggle.param.trigger('active')

pn.Row(toggle)

It produces a toggle button, and when clicked, the text changes.

No I tried to put everything inside a class definition:

class ToggleInClass():
 def __init__(self):
 self.toggle = pn.widgets.Toggle(name='Toggle')
 self.watcher = self.toggle.param.watch(callback, 'active')
 self.toggle.param.set_param(active=False)
 self.toggle.param.trigger('active')

 def callback(self, *events):
 if toggle.active is True: toggle.name = 'Active'
 else: toggle.name = 'Toggle'

toggle_in_class = ToggleInClass()
pn.Row(toggle_in_class.toggle)

Again a button is produced, but this time the callback does not seem to work: The text never changes.

The watcher seems to be ok:
toggle_in_class.watcher gives Watcher(inst=Toggle(), cls=<class 'panel.widgets.Toggle'>, fn=<function callback at 0x000001EC8419E510>, mode='args', onlychanged=True, parameter_names=('active',)).

The output of toggle_in_class.toggle.active alternates according the toggle state.

What is wrong with my callback / class definition?

python widget pyviz

share|improve this question

asked Mar 26 at 19:18

mdkmdk

10811 silver badge66 bronze badges

import panel as pn
import panel.widgets as pnw
pn.extension()

toggle = pn.widgets.Toggle(name='Toggle')

def callback(*events):
 if toggle.active is True: toggle.name = 'Active'
 else: toggle.name = 'Toggle'

watcher = toggle.param.watch(callback, 'active')
toggle.param.set_param(active=False)
toggle.param.trigger('active')

pn.Row(toggle)

class ToggleInClass():
 def __init__(self):
 self.toggle = pn.widgets.Toggle(name='Toggle')
 self.watcher = self.toggle.param.watch(callback, 'active')
 self.toggle.param.set_param(active=False)
 self.toggle.param.trigger('active')

 def callback(self, *events):
 if toggle.active is True: toggle.name = 'Active'
 else: toggle.name = 'Toggle'

toggle_in_class = ToggleInClass()
pn.Row(toggle_in_class.toggle)

share|improve this question

asked Mar 26 at 19:18

mdkmdk

10811 silver badge66 bronze badges

share|improve this question

asked Mar 26 at 19:18

mdkmdk

10811 silver badge66 bronze badges

asked Mar 26 at 19:18

mdkmdk

10811 silver badge66 bronze badges

asked Mar 26 at 19:18

mdkmdk

10811 silver badge66 bronze badges

1 Answer
1

active

oldest

votes

0

After correcting some stupid typos this code is working for me:

class ToggleInClass():

 def __init__(self):
 self.toggle = pn.widgets.Toggle(name='Toggle')
 self.watcher = self.toggle.param.watch(self.callback, 'active')
 self.toggle.param.set_param(active=False)

 def callback(self, *events):
 if self.toggle.active is True: self.toggle.name = 'Active'
 else: self.toggle.name = 'Toggle'

toggle_in_class = ToggleInClass()
pn.Row(toggle_in_class.toggle)

share|improve this answer

answered Mar 30 at 19:18

mdkmdk

10811 silver badge66 bronze badges

add a comment | 

Your Answer

StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f55364751%2fhow-to-use-a-toggle-button-with-a-callback-in-an-class-in-pyviz%23new-answer', 'question_page');

);

Post as a guest

Name

Email

Required, but never shown

0

After correcting some stupid typos this code is working for me:

class ToggleInClass():

 def __init__(self):
 self.toggle = pn.widgets.Toggle(name='Toggle')
 self.watcher = self.toggle.param.watch(self.callback, 'active')
 self.toggle.param.set_param(active=False)

 def callback(self, *events):
 if self.toggle.active is True: self.toggle.name = 'Active'
 else: self.toggle.name = 'Toggle'

toggle_in_class = ToggleInClass()
pn.Row(toggle_in_class.toggle)

share|improve this answer

answered Mar 30 at 19:18

mdkmdk

10811 silver badge66 bronze badges

add a comment | 

0

After correcting some stupid typos this code is working for me:

class ToggleInClass():

 def __init__(self):
 self.toggle = pn.widgets.Toggle(name='Toggle')
 self.watcher = self.toggle.param.watch(self.callback, 'active')
 self.toggle.param.set_param(active=False)

 def callback(self, *events):
 if self.toggle.active is True: self.toggle.name = 'Active'
 else: self.toggle.name = 'Toggle'

toggle_in_class = ToggleInClass()
pn.Row(toggle_in_class.toggle)

share|improve this answer

answered Mar 30 at 19:18

mdkmdk

10811 silver badge66 bronze badges

add a comment | 

After correcting some stupid typos this code is working for me:

class ToggleInClass():

 def __init__(self):
 self.toggle = pn.widgets.Toggle(name='Toggle')
 self.watcher = self.toggle.param.watch(self.callback, 'active')
 self.toggle.param.set_param(active=False)

 def callback(self, *events):
 if self.toggle.active is True: self.toggle.name = 'Active'
 else: self.toggle.name = 'Toggle'

toggle_in_class = ToggleInClass()
pn.Row(toggle_in_class.toggle)

share|improve this answer

answered Mar 30 at 19:18

mdkmdk

10811 silver badge66 bronze badges

class ToggleInClass():

 def __init__(self):
 self.toggle = pn.widgets.Toggle(name='Toggle')
 self.watcher = self.toggle.param.watch(self.callback, 'active')
 self.toggle.param.set_param(active=False)

 def callback(self, *events):
 if self.toggle.active is True: self.toggle.name = 'Active'
 else: self.toggle.name = 'Toggle'

toggle_in_class = ToggleInClass()
pn.Row(toggle_in_class.toggle)

share|improve this answer

answered Mar 30 at 19:18

mdkmdk

10811 silver badge66 bronze badges

answered Mar 30 at 19:18

mdkmdk

10811 silver badge66 bronze badges

answered Mar 30 at 19:18

mdkmdk

10811 silver badge66 bronze badges