Archived discussions · Captured October 28, 2026

setting circle glyph size with slider

Jn_RdhApr 28, 2016 #1

I am trying to use the slider widget to get user-provided value to set the size of the circle. I am using bokeh server to do this. But i am running into issues with setting up the columndatasource.

Another related question is there a way to create circle glyphs of different size using the same statement?

This is the code I have thus far for working with the slider:

···

from bokeh.plotting import Figure

from bokeh.models import HBox, ColumnDataSource

from bokeh.models.widgets import Slider

from bokeh.io import curdoc

cir_x=[2]

cir_y=[10]

cir_size=5

cir_source = ColumnDataSource(data=dict(

x=cir_x,

y=cir_y,

sz=cir_size

))

plot = Figure(plot_width=400, plot_height=400, title=‘Changing the size of circle’,

x_range=[0,20], y_range=[0,20])

plot.circle(‘x’, ‘y’, size=‘sz’, source=cir_source)

sz_slide = Slider(start=0, end=20, step=1, value=5, title=“Circle Size”)

def update_radius(attrname, old, new):

a = sz_slide.value

x=[2]

y=[10]

cir_source.data = dict(x=x,y=y,sz=a)

for w in [sz_slide]:

w.on_change(‘value’, update_radius)

h_layout = HBox(children=[plot,sz_slide])

curdoc().add_root(h_layout)

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birdsarah_continuumApr 28, 2016 #2

Have you tried

a = [sz_slide.value]

    as opposed to

    a = sz_slide.value

···

On 4/28/16 6:57 AM,
wrote:

jpr.mailing@gmail.com

    I am trying to use the slider widget to get
user-provided value to set the size of the circle. I am using
bokeh server to do this. But i am running into issues with
setting up the columndatasource.

      Another related question is there a way to create circle
glyphs of different size using the same statement?

        This is the code I have thus far for working with the

slider:

from bokeh.plotting import Figure

from bokeh.models import HBox, ColumnDataSource

from bokeh.models.widgets import Slider

from bokeh.io import curdoc

cir_x=[2]

cir_y=[10]

cir_size=5

cir_source = ColumnDataSource(data=dict(

x=cir_x,

y=cir_y,

sz=cir_size

))

            plot = Figure(plot_width=400, plot_height=400,
title=‘Changing the size of circle’,

x_range=[0,20], y_range=[0,20])

plot.circle(‘x’, ‘y’, size=‘sz’, source=cir_source)

            sz_slide = Slider(start=0, end=20, step=1, value=5,

title=“Circle Size”)

def update_radius(attrname, old, new):

a = sz_slide.value

x=[2]

y=[10]

cir_source.data = dict(x=x,y=y,sz=a)

for w in [sz_slide]:

w.on_change(‘value’, update_radius)

h_layout = HBox(children=[plot,sz_slide])

curdoc().add_root(h_layout)

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Jn_RdhApr 28, 2016 #3

Worked like a charm! I had some variation of it but in vain!

···

On Thursday, April 28, 2016 at 3:55:20 PM UTC-4, Sarah Bird wrote:

Have you tried

a = [sz_slide.value]



    as opposed to



    a = sz_slide.value  





       


  On 4/28/16 6:57 AM, > jpr.m...@gmail.com wrote:

    I am trying to use the slider widget to get
user-provided value to set the size of the circle. I am using
bokeh server to do this. But i am running into issues with
setting up the columndatasource.

      Another related question is there a way to create circle
glyphs of different size using the same statement?

        This is the code I have thus far for working with the

slider:

from bokeh.plotting import Figure

from bokeh.models import HBox, ColumnDataSource

from bokeh.models.widgets import Slider

from bokeh.io import curdoc

cir_x=[2]

cir_y=[10]

cir_size=5

cir_source = ColumnDataSource(data=dict(

x=cir_x,

y=cir_y,

sz=cir_size

))

            plot = Figure(plot_width=400, plot_height=400,
title=‘Changing the size of circle’,

x_range=[0,20], y_range=[0,20])

plot.circle(‘x’, ‘y’, size=‘sz’, source=cir_source)

            sz_slide = Slider(start=0, end=20, step=1, value=5,

title=“Circle Size”)

def update_radius(attrname, old, new):

a = sz_slide.value

x=[2]

y=[10]

cir_source.data = dict(x=x,y=y,sz=a)

for w in [sz_slide]:

w.on_change(‘value’, update_radius)

h_layout = HBox(children=[plot,sz_slide])

curdoc().add_root(h_layout)

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  For more options, visit [https://groups.google.com/a/continuum.io/d/optout](https://groups.google.com/a/continuum.io/d/optout).

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Developer, Bokeh

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ehsan.kamalinejadNov 03, 2016 #4

When I run the code it gives me the following error:

ValueError: expected an element of Dict(String, Seq(Any)), got {'y': [10], 'sz': 5}

And I can fix the error by changing

cir_size=5

to

cir_size=[5]

But the slider does not change the radius of the circle. Could you please help me? Thanks

···

On Thursday, April 28, 2016 at 1:01:25 PM UTC-7, Jn Rdh wrote:

Worked like a charm! I had some variation of it but in vain!

On Thursday, April 28, 2016 at 3:55:20 PM UTC-4, Sarah Bird wrote:
Have you tried
a = [sz_slide.value]



    as opposed to



    a = sz_slide.value  





       


  On 4/28/16 6:57 AM, > > jpr.m...@gmail.com wrote:

    I am trying to use the slider widget to get
user-provided value to set the size of the circle. I am using
bokeh server to do this. But i am running into issues with
setting up the columndatasource.

      Another related question is there a way to create circle
glyphs of different size using the same statement?

        This is the code I have thus far for working with the

slider:

from bokeh.plotting import Figure

from bokeh.models import HBox, ColumnDataSource

from bokeh.models.widgets import Slider

from bokeh.io import curdoc

cir_x=[2]

cir_y=[10]

cir_size=5

cir_source = ColumnDataSource(data=dict(

x=cir_x,

y=cir_y,

sz=cir_size

))

            plot = Figure(plot_width=400, plot_height=400,
title=‘Changing the size of circle’,

x_range=[0,20], y_range=[0,20])

plot.circle(‘x’, ‘y’, size=‘sz’, source=cir_source)

            sz_slide = Slider(start=0, end=20, step=1, value=5,

title=“Circle Size”)

def update_radius(attrname, old, new):

a = sz_slide.value

x=[2]

y=[10]

cir_source.data = dict(x=x,y=y,sz=a)

for w in [sz_slide]:

w.on_change(‘value’, update_radius)

h_layout = HBox(children=[plot,sz_slide])

curdoc().add_root(h_layout)

–

  You received this message because you are subscribed to the Google

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  For more options, visit [https://groups.google.com/a/continuum.io/d/optout](https://groups.google.com/a/continuum.io/d/optout).

–
Sarah Bird
Developer, Bokeh

    [
      <img alt="Continuum Analytics" src="https://lh6.googleusercontent.com/proxy/VYgVjggTk1hCXSN9wFkffE3I6kxTvJ51tT4KvDXOuKbs1WyFG66k7kt2-vkDimbyxfWtP-d1paJmstMYhPPnDYSUF4rLPoYM2GM2QFM=w5000-h5000" height="30px" width="150px">
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BryanNov 03, 2016 #5

Hi,

Please see this other recent post about the need to call session.loop_until_closed (or better: writing a native server app):

https://groups.google.com/a/continuum.io/d/msg/bokeh/CtrZGIvdCjI/HYbhGMGjCQAJ

Thanks,

Bryan

···

On Nov 3, 2016, at 3:40 PM, ehsan.kamalinejad@gmail.com wrote:

When I run the code it gives me the following error:
ValueError: expected an element of Dict(String, Seq(Any)), got {'y': [10], 'sz': 5}
And I can fix the error by changing
cir_size=5
to
cir_size=[5]
But the slider does not change the radius of the circle. Could you please help me? Thanks

On Thursday, April 28, 2016 at 1:01:25 PM UTC-7, Jn Rdh wrote:
Worked like a charm! I had some variation of it but in vain!

On Thursday, April 28, 2016 at 3:55:20 PM UTC-4, Sarah Bird wrote:
Have you tried

a = [sz_slide.value]

as opposed to

a = sz_slide.value

On 4/28/16 6:57 AM, jpr.m...@gmail.com wrote:

I am trying to use the slider widget to get user-provided value to set the size of the circle. I am using bokeh server to do this. But i am running into issues with setting up the columndatasource.

Another related question is there a way to create circle glyphs of different size using the same statement?

This is the code I have thus far for working with the slider:
----------------------------------------------------------------

from bokeh.plotting import Figure
from bokeh.models import HBox, ColumnDataSource
from bokeh.models.widgets import Slider
from bokeh.io import curdoc

cir_x=[2]
cir_y=[10]
cir_size=5

cir_source = ColumnDataSource(data=dict(
                                x=cir_x,
                                y=cir_y,
                                sz=cir_size
                                ))

plot = Figure(plot_width=400, plot_height=400, title='Changing the size of circle',
              x_range=[0,20], y_range=[0,20])

plot.circle('x', 'y', size='sz', source=cir_source)

sz_slide = Slider(start=0, end=20, step=1, value=5, title="Circle Size")

def update_radius(attrname, old, new):
    a = sz_slide.value

    x=[2]
    y=[10]
    cir_source.data = dict(x=x,y=y,sz=a)

for w in [sz_slide]:
    w.on_change('value', update_radius)

h_layout = HBox(children=[plot,sz_slide])
curdoc().add_root(h_layout)

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ehsan.kamalinejadNov 04, 2016 #6

Thanks Bryan.

···

On Thursday, November 3, 2016 at 4:06:03 PM UTC-7, Bryan Van de ven wrote:

Hi,

Please see this other recent post about the need to call session.loop_until_closed (or better: writing a native server app):
    [https://groups.google.com/a/continuum.io/d/msg/bokeh/CtrZGIvdCjI/HYbhGMGjCQAJ](https://groups.google.com/a/continuum.io/d/msg/bokeh/CtrZGIvdCjI/HYbhGMGjCQAJ)
Thanks,

Bryan

On Nov 3, 2016, at 3:40 PM, ehsan.ka...@gmail.com wrote:

When I run the code it gives me the following error:

ValueError: expected an element of Dict(String, Seq(Any)), got {‘y’: [10], ‘sz’: 5}

And I can fix the error by changing
cir_size=5

to
cir_size=[5]

But the slider does not change the radius of the circle. Could you please help me? Thanks

On Thursday, April 28, 2016 at 1:01:25 PM UTC-7, Jn Rdh wrote:

Worked like a charm! I had some variation of it but in vain!

On Thursday, April 28, 2016 at 3:55:20 PM UTC-4, Sarah Bird wrote:

Have you tried

a = [sz_slide.value]

as opposed to

a = sz_slide.value

On 4/28/16 6:57 AM, jpr.m...@gmail.com wrote:

I am trying to use the slider widget to get user-provided value to set the size of the circle. I am using bokeh server to do this. But i am running into issues with setting up the columndatasource.

Another related question is there a way to create circle glyphs of different size using the same statement?

This is the code I have thus far for working with the slider:

from bokeh.plotting import Figure

from bokeh.models import HBox, ColumnDataSource

from bokeh.models.widgets import Slider

from bokeh.io import curdoc

cir_x=[2]

cir_y=[10]

cir_size=5

cir_source = ColumnDataSource(data=dict(
                            x=cir_x,
                            y=cir_y,
                            sz=cir_size
                            ))
plot = Figure(plot_width=400, plot_height=400, title=‘Changing the size of circle’,
x_range=[0,20], y_range=[0,20])

plot.circle(‘x’, ‘y’, size=‘sz’, source=cir_source)

sz_slide = Slider(start=0, end=20, step=1, value=5, title=“Circle Size”)

def update_radius(attrname, old, new):
a = sz_slide.value  

x=[2]    
y=[10]
cir_source.data = dict(x=x,y=y,sz=a)
for w in [sz_slide]:
w.on_change('value', update_radius)
h_layout = HBox(children=[plot,sz_slide])

curdoc().add_root(h_layout)

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Developer, Bokeh

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systemJul 21, 2021 #7

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