HBar Not Updating As Expected in Bokeh Server

neuron878 · January 30, 2018, 5:58pm

Could someone tell me why this doesn’t work and what I need to do to fix it?

I’m wanting a horizontal bar graph to update based on a few widget selections in Bokeh Server, but it is not updating as expected.

Plus, the initial chart is not filtering correctly.

I’m not getting any errors. The code is below.

import pandas as pd

from bokeh.layouts import row, widgetbox
from bokeh.models.widgets import Select, MultiSelect
from bokeh.plotting import curdoc, figure
from bokeh.models import ColumnDataSource, LabelSet
from bokeh.models.ranges import FactorRange
from bokeh.io import show

df = pd.DataFrame(data={
‘category’: [‘e’, ‘e’, ‘f’, ‘f’],
‘subcategory’: [‘a’, ‘b’, ‘c’, ‘d’],
‘number’: [1, 2, 3, 4],
‘number2’: [5, 6, 7, 8]
})

df[‘cat_sub’] = list(zip(df.category, df.subcategory))

source = ColumnDataSource(df)

p = figure(plot_width=800,
y_range=FactorRange(factors=list(df.cat_sub)),
title=‘sweet’, plot_height=500)

h1 = p.hbar(right=“number”, y=“cat_sub”, color=‘darkgrey’,
height=0.8, source=source)

labels = LabelSet(
text=‘number’, text_font_size=‘9pt’, level=‘glyph’,
x=‘number’, y=‘cat_sub’, x_offset=3, y_offset=-6.5,
source=source)

p.add_layout(labels)

def update_source():
df2 = df.copy()
df3 = df2[
df2.category.isin(cats.value)
& df2.subcategory.isin(subcats.value)]
df4 = df3.reindex(columns=[‘category’, ‘subcategory’, nums.value])
source.data = source.from_df(df4)

def update_glyph():
h1.glyph.right = nums.value
labels.text = nums.value
labels.x = nums.value

def update(attr, old, new):
update_source()
update_glyph()
r.children[1] = update_glyph()

catlist_u = df[‘category’].unique().tolist()
subcatlist_u = df[‘subcategory’].unique().tolist()

cats = MultiSelect(title=‘Category’, value=[‘f’], options=catlist_u)

subcats = MultiSelect(title=‘Subcategory’, value=[‘a’],
options=subcatlist_u)

nums = Select(title=‘Value’, value=‘number2’, options=[‘number’, ‘number2’])

cats.on_change(‘value’, update)
subcats.on_change(‘value’, update)
nums.on_change(‘value’, update)

w = widgetbox([cats, subcats, nums])

r = row([w, p], sizing_mode=“scale_width”)

curdoc().add_root(r)
curdoc().title = “test”

``

Thanks in advance!

Bryan · January 30, 2018, 6:42pm

Hi,

There's at least a few immediate things wrong. This line:

df4 = df3.reindex(columns=['category', 'subcategory', nums.value])

removes the "cat_sub" column, but that column is needed by the glyph and the label. You can see browser JS console error messages complaining about the missing field. Adding this afterward seems to fix that:

df4['cat_sub'] = list(zip(df4.category, df4.subcategory))

But also this line is wrong:

r.children[1] = update_glyph()

The update_glyph function returns None, so you are actually replacing your plot with None. I just deleted that line altogether.

After that, I would describe things as working. Although with the given data, and initial configuration, things are a bit clumsy. Since no subcategories are initially selected, the first time update is called, everything looks empty. But if you select some/all subcategories you can see the updates.

Thanks,

Bryan

···

On Jan 30, 2018, at 11:58, [email protected] wrote:

Could someone tell me why this doesn't work and what I need to do to fix it?

I'm wanting a horizontal bar graph to update based on a few widget selections in Bokeh Server, but it is not updating as expected.

<Auto Generated Inline Image 1.png>

Plus, the initial chart is not filtering correctly.

<Auto Generated Inline Image 2.png>

I'm not getting any errors. The code is below.

import pandas as pd

from bokeh.layouts import row, widgetbox
from bokeh.models.widgets import Select, MultiSelect
from bokeh.plotting import curdoc, figure
from bokeh.models import ColumnDataSource, LabelSet
from bokeh.models.ranges import FactorRange
from bokeh.io import show

df = pd.DataFrame(data={
        'category': ['e', 'e', 'f', 'f'],
        'subcategory': ['a', 'b', 'c', 'd'],
        'number': [1, 2, 3, 4],
        'number2': [5, 6, 7, 8]
        })

df['cat_sub'] = list(zip(df.category, df.subcategory))

source = ColumnDataSource(df)

p = figure(plot_width=800,
           y_range=FactorRange(factors=list(df.cat_sub)),
           title='sweet', plot_height=500)

h1 = p.hbar(right="number", y="cat_sub", color='darkgrey',
            height=0.8, source=source)

labels = LabelSet(
        text='number', text_font_size='9pt', level='glyph',
        x='number', y='cat_sub', x_offset=3, y_offset=-6.5,
source=source)

p.add_layout(labels)

def update_source():
    df2 = df.copy()
    df3 = df2[
            df2.category.isin(cats.value)
            & df2.subcategory.isin(subcats.value)]
    df4 = df3.reindex(columns=['category', 'subcategory', nums.value])
    source.data = source.from_df(df4)

def update_glyph():
    h1.glyph.right = nums.value
    labels.text = nums.value
    labels.x = nums.value

def update(attr, old, new):
    update_source()
    update_glyph()
    r.children[1] = update_glyph()

catlist_u = df['category'].unique().tolist()
subcatlist_u = df['subcategory'].unique().tolist()

cats = MultiSelect(title='Category', value=['f'], options=catlist_u)

subcats = MultiSelect(title='Subcategory', value=['a'],
                      options=subcatlist_u)

nums = Select(title='Value', value='number2', options=['number', 'number2'])

cats.on_change('value', update)
subcats.on_change('value', update)
nums.on_change('value', update)

w = widgetbox([cats, subcats, nums])

r = row([w, p], sizing_mode="scale_width")

curdoc().add_root(r)
curdoc().title = "test"

Thanks in advance!

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neuron878 · January 30, 2018, 9:53pm

Great! Thanks, Bryan. I made the changes you suggested, which appears to have gotten me a little closer, but now I’m still seeing odd behavior.

Not being a web developer, I now realize after reading your response that I can see Bokeh errors in the browser. After running my newly updated module, and changing the category or subcategory, the error I get in the browser is this:

properties.js:67 Uncaught Error: attempted to retrieve property array for nonexistent field ‘number’
I’m not seeing where my code would be causing this error.

From the code in my original message, I changed…
df4 = df3.reindex(columns=[‘category’, ‘subcategory’, nums.value])
to…
df4 = df3.reindex(columns=[‘category’, ‘subcategory’, ‘cat_sub’, nums.value, ])

Then I removed r.children[1] = update_glyph().

I also changed the subcat value to ‘c’.

I’ve been wrestling with this for way too long, so I appreciate your help!

···

On Tuesday, January 30, 2018 at 12:42:11 PM UTC-6, Bryan Van de ven wrote:

Hi,

There’s at least a few immediate things wrong. This line:
    df4 = df3.reindex(columns=['category', 'subcategory', nums.value])
removes the “cat_sub” column, but that column is needed by the glyph and the label. You can see browser JS console error messages complaining about the missing field. Adding this afterward seems to fix that:
     df4['cat_sub'] = list(zip(df4.category, df4.subcategory))
But also this line is wrong:
    r.children[1] = update_glyph()
The update_glyph function returns None, so you are actually replacing your plot with None. I just deleted that line altogether.

After that, I would describe things as working. Although with the given data, and initial configuration, things are a bit clumsy. Since no subcategories are initially selected, the first time update is called, everything looks empty. But if you select some/all subcategories you can see the updates.

Thanks,

Bryan

On Jan 30, 2018, at 11:58, [email protected] wrote:

Could someone tell me why this doesn’t work and what I need to do to fix it?

I’m wanting a horizontal bar graph to update based on a few widget selections in Bokeh Server, but it is not updating as expected.

<Auto Generated Inline Image 1.png>

Plus, the initial chart is not filtering correctly.

<Auto Generated Inline Image 2.png>

I’m not getting any errors. The code is below.

import pandas as pd

from bokeh.layouts import row, widgetbox

from bokeh.models.widgets import Select, MultiSelect

from bokeh.plotting import curdoc, figure

from bokeh.models import ColumnDataSource, LabelSet

from bokeh.models.ranges import FactorRange

from bokeh.io import show

df = pd.DataFrame(data={
    'category': ['e', 'e', 'f', 'f'],
    'subcategory': ['a', 'b', 'c', 'd'],
    'number': [1, 2, 3, 4],
    'number2': [5, 6, 7, 8]
    })
df[‘cat_sub’] = list(zip(df.category, df.subcategory))

source = ColumnDataSource(df)

p = figure(plot_width=800,
       y_range=FactorRange(factors=list(df.cat_sub)),
       title='sweet', plot_height=500)
h1 = p.hbar(right=“number”, y=“cat_sub”, color=‘darkgrey’,
        height=0.8, source=source)
labels = LabelSet(
    text='number', text_font_size='9pt', level='glyph',
    x='number', y='cat_sub', x_offset=3, y_offset=-6.5,
source=source)

p.add_layout(labels)

def update_source():
df2 = df.copy()
df3 = df2[
        df2.category.isin(cats.value)
        & df2.subcategory.isin(subcats.value)]
df4 = df3.reindex(columns=['category', 'subcategory', nums.value])
source.data = source.from_df(df4)
def update_glyph():
h1.glyph.right = nums.value
labels.text = nums.value
labels.x = nums.value
def update(attr, old, new):
update_source()
update_glyph()
r.children[1] = update_glyph()
catlist_u = df[‘category’].unique().tolist()

subcatlist_u = df[‘subcategory’].unique().tolist()

cats = MultiSelect(title=‘Category’, value=[‘f’], options=catlist_u)

subcats = MultiSelect(title=‘Subcategory’, value=[‘a’],
                  options=subcatlist_u)
nums = Select(title=‘Value’, value=‘number2’, options=[‘number’, ‘number2’])

cats.on_change(‘value’, update)

subcats.on_change(‘value’, update)

nums.on_change(‘value’, update)

w = widgetbox([cats, subcats, nums])

r = row([w, p], sizing_mode=“scale_width”)

curdoc().add_root(r)

curdoc().title = “test”

Thanks in advance!

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neuron878 · January 30, 2018, 10:23pm

Okay I’m getting closer. I got the bars to update but the labels are not updating.

I changed the default value of nums to “number”. This makes it match the initial data source, which appears to have fixed the bars. So the bars are now behaving as I would expect, but the labels for each column are not updating when changing the value of nums to ‘number2’. I’m still getting the same error in the browser.

···

On Tuesday, January 30, 2018 at 3:53:39 PM UTC-6, [email protected] wrote:

Great! Thanks, Bryan. I made the changes you suggested, which appears to have gotten me a little closer, but now I’m still seeing odd behavior.

Not being a web developer, I now realize after reading your response that I can see Bokeh errors in the browser. After running my newly updated module, and changing the category or subcategory, the error I get in the browser is this:
properties.js:67 Uncaught Error: attempted to retrieve property array for nonexistent field ‘number’
Hi,

There’s at least a few immediate things wrong. This line:
    df4 = df3.reindex(columns=['category', 'subcategory', nums.value])
removes the “cat_sub” column, but that column is needed by the glyph and the label. You can see browser JS console error messages complaining about the missing field. Adding this afterward seems to fix that:
     df4['cat_sub'] = list(zip(df4.category, df4.subcategory))
But also this line is wrong:
    r.children[1] = update_glyph()
The update_glyph function returns None, so you are actually replacing your plot with None. I just deleted that line altogether.

After that, I would describe things as working. Although with the given data, and initial configuration, things are a bit clumsy. Since no subcategories are initially selected, the first time update is called, everything looks empty. But if you select some/all subcategories you can see the updates.

Thanks,

Bryan

On Jan 30, 2018, at 11:58, [email protected] wrote:

Could someone tell me why this doesn’t work and what I need to do to fix it?

I’m wanting a horizontal bar graph to update based on a few widget selections in Bokeh Server, but it is not updating as expected.

<Auto Generated Inline Image 1.png>

Plus, the initial chart is not filtering correctly.

<Auto Generated Inline Image 2.png>

I’m not getting any errors. The code is below.

import pandas as pd

from bokeh.layouts import row, widgetbox

from bokeh.models.widgets import Select, MultiSelect

from bokeh.plotting import curdoc, figure

from bokeh.models import ColumnDataSource, LabelSet

from bokeh.models.ranges import FactorRange

from bokeh.io import show

df = pd.DataFrame(data={
    'category': ['e', 'e', 'f', 'f'],
    'subcategory': ['a', 'b', 'c', 'd'],
    'number': [1, 2, 3, 4],
    'number2': [5, 6, 7, 8]
    })
df[‘cat_sub’] = list(zip(df.category, df.subcategory))

source = ColumnDataSource(df)

p = figure(plot_width=800,
       y_range=FactorRange(factors=list(df.cat_sub)),
       title='sweet', plot_height=500)
h1 = p.hbar(right=“number”, y=“cat_sub”, color=‘darkgrey’,
        height=0.8, source=source)
labels = LabelSet(
    text='number', text_font_size='9pt', level='glyph',
    x='number', y='cat_sub', x_offset=3, y_offset=-6.5,
source=source)

p.add_layout(labels)

def update_source():
df2 = df.copy()
df3 = df2[
        df2.category.isin(cats.value)
        & df2.subcategory.isin(subcats.value)]
df4 = df3.reindex(columns=['category', 'subcategory', nums.value])
source.data = source.from_df(df4)
def update_glyph():
h1.glyph.right = nums.value
labels.text = nums.value
labels.x = nums.value
def update(attr, old, new):
update_source()
update_glyph()
r.children[1] = update_glyph()
catlist_u = df[‘category’].unique().tolist()

subcatlist_u = df[‘subcategory’].unique().tolist()

cats = MultiSelect(title=‘Category’, value=[‘f’], options=catlist_u)

subcats = MultiSelect(title=‘Subcategory’, value=[‘a’],
                  options=subcatlist_u)
nums = Select(title=‘Value’, value=‘number2’, options=[‘number’, ‘number2’])

cats.on_change(‘value’, update)

subcats.on_change(‘value’, update)

nums.on_change(‘value’, update)

w = widgetbox([cats, subcats, nums])

r = row([w, p], sizing_mode=“scale_width”)

curdoc().add_root(r)

curdoc().title = “test”

Thanks in advance!

–
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<Auto Generated Inline Image 1.png><Auto Generated Inline Image 2.png>
I’m not seeing where my code would be causing this error.

From the code in my original message, I changed…
df4 = df3.reindex(columns=[‘category’, ‘subcategory’, nums.value])
to…
df4 = df3.reindex(columns=[‘category’, ‘subcategory’, ‘cat_sub’, nums.value, ])

Then I removed r.children[1] = update_glyph().

I also changed the subcat value to ‘c’.

I’ve been wrestling with this for way too long, so I appreciate your help!

On Tuesday, January 30, 2018 at 12:42:11 PM UTC-6, Bryan Van de ven wrote:

neuron878 · January 30, 2018, 10:32pm

…and by labels not updating, I mean these:

···

On Tuesday, January 30, 2018 at 4:23:41 PM UTC-6, [email protected] wrote:

Okay I’m getting closer. I got the bars to update but the labels are not updating.

I changed the default value of nums to “number”. This makes it match the initial data source, which appears to have fixed the bars. So the bars are now behaving as I would expect, but the labels for each column are not updating when changing the value of nums to ‘number2’. I’m still getting the same error in the browser.

On Tuesday, January 30, 2018 at 3:53:39 PM UTC-6, [email protected] wrote:
Great! Thanks, Bryan. I made the changes you suggested, which appears to have gotten me a little closer, but now I’m still seeing odd behavior.

Not being a web developer, I now realize after reading your response that I can see Bokeh errors in the browser. After running my newly updated module, and changing the category or subcategory, the error I get in the browser is this:
properties.js:67 Uncaught Error: attempted to retrieve property array for nonexistent field ‘number’
Hi,

There’s at least a few immediate things wrong. This line:
    df4 = df3.reindex(columns=['category', 'subcategory', nums.value])
removes the “cat_sub” column, but that column is needed by the glyph and the label. You can see browser JS console error messages complaining about the missing field. Adding this afterward seems to fix that:
     df4['cat_sub'] = list(zip(df4.category, df4.subcategory))
But also this line is wrong:
    r.children[1] = update_glyph()
The update_glyph function returns None, so you are actually replacing your plot with None. I just deleted that line altogether.

After that, I would describe things as working. Although with the given data, and initial configuration, things are a bit clumsy. Since no subcategories are initially selected, the first time update is called, everything looks empty. But if you select some/all subcategories you can see the updates.

Thanks,

Bryan

On Jan 30, 2018, at 11:58, [email protected] wrote:

Could someone tell me why this doesn’t work and what I need to do to fix it?

I’m wanting a horizontal bar graph to update based on a few widget selections in Bokeh Server, but it is not updating as expected.

<Auto Generated Inline Image 1.png>

Plus, the initial chart is not filtering correctly.

<Auto Generated Inline Image 2.png>

I’m not getting any errors. The code is below.

import pandas as pd

from bokeh.layouts import row, widgetbox

from bokeh.models.widgets import Select, MultiSelect

from bokeh.plotting import curdoc, figure

from bokeh.models import ColumnDataSource, LabelSet

from bokeh.models.ranges import FactorRange

from bokeh.io import show

df = pd.DataFrame(data={
    'category': ['e', 'e', 'f', 'f'],
    'subcategory': ['a', 'b', 'c', 'd'],
    'number': [1, 2, 3, 4],
    'number2': [5, 6, 7, 8]
    })
df[‘cat_sub’] = list(zip(df.category, df.subcategory))

source = ColumnDataSource(df)

p = figure(plot_width=800,
       y_range=FactorRange(factors=list(df.cat_sub)),
       title='sweet', plot_height=500)
h1 = p.hbar(right=“number”, y=“cat_sub”, color=‘darkgrey’,
        height=0.8, source=source)
labels = LabelSet(
    text='number', text_font_size='9pt', level='glyph',
    x='number', y='cat_sub', x_offset=3, y_offset=-6.5,
source=source)

p.add_layout(labels)

def update_source():
df2 = df.copy()
df3 = df2[
        df2.category.isin(cats.value)
        & df2.subcategory.isin(subcats.value)]
df4 = df3.reindex(columns=['category', 'subcategory', nums.value])
source.data = source.from_df(df4)
def update_glyph():
h1.glyph.right = nums.value
labels.text = nums.value
labels.x = nums.value
def update(attr, old, new):
update_source()
update_glyph()
r.children[1] = update_glyph()
catlist_u = df[‘category’].unique().tolist()

subcatlist_u = df[‘subcategory’].unique().tolist()

cats = MultiSelect(title=‘Category’, value=[‘f’], options=catlist_u)

subcats = MultiSelect(title=‘Subcategory’, value=[‘a’],
                  options=subcatlist_u)
nums = Select(title=‘Value’, value=‘number2’, options=[‘number’, ‘number2’])

cats.on_change(‘value’, update)

subcats.on_change(‘value’, update)

nums.on_change(‘value’, update)

w = widgetbox([cats, subcats, nums])

r = row([w, p], sizing_mode=“scale_width”)

curdoc().add_root(r)

curdoc().title = “test”

Thanks in advance!

–
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To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].

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I’m not seeing where my code would be causing this error.

From the code in my original message, I changed…
df4 = df3.reindex(columns=[‘category’, ‘subcategory’, nums.value])
to…
df4 = df3.reindex(columns=[‘category’, ‘subcategory’, ‘cat_sub’, nums.value, ])

Then I removed r.children[1] = update_glyph().

I also changed the subcat value to ‘c’.

I’ve been wrestling with this for way too long, so I appreciate your help!

On Tuesday, January 30, 2018 at 12:42:11 PM UTC-6, Bryan Van de ven wrote:

Bryan · January 30, 2018, 10:36pm

Hi,

You are probably not including the column that the labels refer to for their coordinate. I would suggest putting some print statements in update_source so that you can see exactly what data you are setting. You will probably find that it is missing the "number2" column.

Thanks,

Bryan

···

On Jan 30, 2018, at 16:32, [email protected] wrote:

...and by labels not updating, I mean these:

<Auto Generated Inline Image 1.png>

On Tuesday, January 30, 2018 at 4:23:41 PM UTC-6, tickn...@gmail.com wrote:
Okay I'm getting closer. I got the bars to update but the labels are not updating.

I changed the default value of nums to "number". This makes it match the initial data source, which appears to have fixed the bars. So the bars are now behaving as I would expect, but the labels for each column are not updating when changing the value of nums to 'number2'. I'm still getting the same error in the browser.

On Tuesday, January 30, 2018 at 3:53:39 PM UTC-6, tickn...@gmail.com wrote:
Great! Thanks, Bryan. I made the changes you suggested, which appears to have gotten me a little closer, but now I'm still seeing odd behavior.

Not being a web developer, I now realize after reading your response that I can see Bokeh errors in the browser. After running my newly updated module, and changing the category or subcategory, the error I get in the browser is this:
properties.js:67 Uncaught Error: attempted to retrieve property array for nonexistent field 'number'
I'm not seeing where my code would be causing this error.

From the code in my original message, I changed...
df4 = df3.reindex(columns=['category', 'subcategory', nums.value])
to...
df4 = df3.reindex(columns=['category', 'subcategory', 'cat_sub', nums.value, ])

Then I removed r.children[1] = update_glyph().

I also changed the subcat value to 'c'.

I've been wrestling with this for way too long, so I appreciate your help!

On Tuesday, January 30, 2018 at 12:42:11 PM UTC-6, Bryan Van de ven wrote:
Hi,

There's at least a few immediate things wrong. This line:

        df4 = df3.reindex(columns=['category', 'subcategory', nums.value])

removes the "cat_sub" column, but that column is needed by the glyph and the label. You can see browser JS console error messages complaining about the missing field. Adding this afterward seems to fix that:

         df4['cat_sub'] = list(zip(df4.category, df4.subcategory))

But also this line is wrong:

        r.children[1] = update_glyph()

The update_glyph function returns None, so you are actually replacing your plot with None. I just deleted that line altogether.

After that, I would describe things as working. Although with the given data, and initial configuration, things are a bit clumsy. Since no subcategories are initially selected, the first time update is called, everything looks empty. But if you select some/all subcategories you can see the updates.

Thanks,

Bryan

> On Jan 30, 2018, at 11:58, tickn...@gmail.com wrote:
>
> Could someone tell me why this doesn't work and what I need to do to fix it?
>
> I'm wanting a horizontal bar graph to update based on a few widget selections in Bokeh Server, but it is not updating as expected.
>
> <Auto Generated Inline Image 1.png>
>
> Plus, the initial chart is not filtering correctly.
>
> <Auto Generated Inline Image 2.png>
>
> I'm not getting any errors. The code is below.
>
> import pandas as pd
>
> from bokeh.layouts import row, widgetbox
> from bokeh.models.widgets import Select, MultiSelect
> from bokeh.plotting import curdoc, figure
> from bokeh.models import ColumnDataSource, LabelSet
> from bokeh.models.ranges import FactorRange
> from bokeh.io import show
>
> df = pd.DataFrame(data={
> 'category': ['e', 'e', 'f', 'f'],
> 'subcategory': ['a', 'b', 'c', 'd'],
> 'number': [1, 2, 3, 4],
> 'number2': [5, 6, 7, 8]
> })
>
> df['cat_sub'] = list(zip(df.category, df.subcategory))
>
> source = ColumnDataSource(df)
>
> p = figure(plot_width=800,
> y_range=FactorRange(factors=list(df.cat_sub)),
> title='sweet', plot_height=500)
>
> h1 = p.hbar(right="number", y="cat_sub", color='darkgrey',
> height=0.8, source=source)
>
> labels = LabelSet(
> text='number', text_font_size='9pt', level='glyph',
> x='number', y='cat_sub', x_offset=3, y_offset=-6.5,
> source=source)
>
> p.add_layout(labels)
>
>
> def update_source():
> df2 = df.copy()
> df3 = df2[
> df2.category.isin(cats.value)
> & df2.subcategory.isin(subcats.value)]
> df4 = df3.reindex(columns=['category', 'subcategory', nums.value])
> source.data = source.from_df(df4)
>
>
> def update_glyph():
> h1.glyph.right = nums.value
> labels.text = nums.value
> labels.x = nums.value
>
>
> def update(attr, old, new):
> update_source()
> update_glyph()
> r.children[1] = update_glyph()
>
>
> catlist_u = df['category'].unique().tolist()
> subcatlist_u = df['subcategory'].unique().tolist()
>
> cats = MultiSelect(title='Category', value=['f'], options=catlist_u)
>
> subcats = MultiSelect(title='Subcategory', value=['a'],
> options=subcatlist_u)
>
> nums = Select(title='Value', value='number2', options=['number', 'number2'])
>
> cats.on_change('value', update)
> subcats.on_change('value', update)
> nums.on_change('value', update)
>
> w = widgetbox([cats, subcats, nums])
>
> r = row([w, p], sizing_mode="scale_width")
>
> curdoc().add_root(r)
> curdoc().title = "test"
>
> Thanks in advance!
>
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neuron878 · January 31, 2018, 3:43pm

Good idea with those print statements. However, nothing strikes me as suspicious. After changing the value in the browser to “number2”, the source and glyph attributes appear to be set correctly:

In [5]: print(“source.data”)
…: pp(source.data)

source.data

{‘cat_sub’: array([(‘e’, ‘a’), (‘e’, ‘b’), (‘f’, ‘c’), (‘f’, ‘d’)], dtype=object),

‘category’: array([‘e’, ‘e’, ‘f’, ‘f’], dtype=object),

‘index’: array([0, 1, 2, 3], dtype=int64),

‘number2’: array([5, 6, 7, 8], dtype=int64),

‘subcategory’: array([‘a’, ‘b’, ‘c’, ‘d’], dtype=object)}

In [7]: print(“Is h1.data_source.data == source.data ?”,
…: h1.data_source.data == source.data)

…: print(“Is h1.glyph.right == nums.value ?”,

…: h1.glyph.right == nums.value)

…: print(“Is labels.text == nums.value ?”,

…: labels.text == nums.value)

…: print(“Is labels.x == nums.value ?”,

…: labels.x == nums.value)

Is h1.data_source.data == source.data ? True

Is h1.glyph.right == nums.value ? True

Is labels.text == nums.value ? True

Is labels.x == nums.value ? True

What else am I missing?

Thanks

···

On Tuesday, January 30, 2018 at 4:36:25 PM UTC-6, Bryan Van de ven wrote:

Hi,

You are probably not including the column that the labels refer to for their coordinate. I would suggest putting some print statements in update_source so that you can see exactly what data you are setting. You will probably find that it is missing the “number2” column.

Thanks,

Bryan

On Jan 30, 2018, at 16:32, [email protected] wrote:

…and by labels not updating, I mean these:

<Auto Generated Inline Image 1.png>

On Tuesday, January 30, 2018 at 4:23:41 PM UTC-6, [email protected] wrote:

Okay I’m getting closer. I got the bars to update but the labels are not updating.

I changed the default value of nums to “number”. This makes it match the initial data source, which appears to have fixed the bars. So the bars are now behaving as I would expect, but the labels for each column are not updating when changing the value of nums to ‘number2’. I’m still getting the same error in the browser.

On Tuesday, January 30, 2018 at 3:53:39 PM UTC-6, [email protected] wrote:

Great! Thanks, Bryan. I made the changes you suggested, which appears to have gotten me a little closer, but now I’m still seeing odd behavior.

Not being a web developer, I now realize after reading your response that I can see Bokeh errors in the browser. After running my newly updated module, and changing the category or subcategory, the error I get in the browser is this:

properties.js:67 Uncaught Error: attempted to retrieve property array for nonexistent field ‘number’

I’m not seeing where my code would be causing this error.

From the code in my original message, I changed…

df4 = df3.reindex(columns=[‘category’, ‘subcategory’, nums.value])

to…

df4 = df3.reindex(columns=[‘category’, ‘subcategory’, ‘cat_sub’, nums.value, ])

Then I removed r.children[1] = update_glyph().

I also changed the subcat value to ‘c’.

I’ve been wrestling with this for way too long, so I appreciate your help!

On Tuesday, January 30, 2018 at 12:42:11 PM UTC-6, Bryan Van de ven wrote:
Hi,

There’s at least a few immediate things wrong. This line:
    df4 = df3.reindex(columns=['category', 'subcategory', nums.value])
removes the “cat_sub” column, but that column is needed by the glyph and the label. You can see browser JS console error messages complaining about the missing field. Adding this afterward seems to fix that:
     df4['cat_sub'] = list(zip(df4.category, df4.subcategory))
But also this line is wrong:
    r.children[1] = update_glyph()
The update_glyph function returns None, so you are actually replacing your plot with None. I just deleted that line altogether.

After that, I would describe things as working. Although with the given data, and initial configuration, things are a bit clumsy. Since no subcategories are initially selected, the first time update is called, everything looks empty. But if you select some/all subcategories you can see the updates.

Thanks,

Bryan

On Jan 30, 2018, at 11:58, [email protected] wrote:

Could someone tell me why this doesn’t work and what I need to do to fix it?

I’m wanting a horizontal bar graph to update based on a few widget selections in Bokeh Server, but it is not updating as expected.

<Auto Generated Inline Image 1.png>

Plus, the initial chart is not filtering correctly.

<Auto Generated Inline Image 2.png>

I’m not getting any errors. The code is below.

import pandas as pd

from bokeh.layouts import row, widgetbox
from bokeh.models.widgets import Select, MultiSelect
from bokeh.plotting import curdoc, figure
from bokeh.models import ColumnDataSource, LabelSet
from bokeh.models.ranges import FactorRange
from bokeh.io import show

df = pd.DataFrame(data={
‘category’: [‘e’, ‘e’, ‘f’, ‘f’],
‘subcategory’: [‘a’, ‘b’, ‘c’, ‘d’],
‘number’: [1, 2, 3, 4],
‘number2’: [5, 6, 7, 8]
})

df[‘cat_sub’] = list(zip(df.category, df.subcategory))

source = ColumnDataSource(df)

p = figure(plot_width=800,
y_range=FactorRange(factors=list(df.cat_sub)),
title=‘sweet’, plot_height=500)

h1 = p.hbar(right=“number”, y=“cat_sub”, color=‘darkgrey’,
height=0.8, source=source)

labels = LabelSet(
text=‘number’, text_font_size=‘9pt’, level=‘glyph’,
x=‘number’, y=‘cat_sub’, x_offset=3, y_offset=-6.5,
source=source)

p.add_layout(labels)

def update_source():
df2 = df.copy()
df3 = df2[
df2.category.isin(cats.value)
& df2.subcategory.isin(subcats.value)]
df4 = df3.reindex(columns=[‘category’, ‘subcategory’, nums.value])
source.data = source.from_df(df4)

def update_glyph():
h1.glyph.right = nums.value
labels.text = nums.value
labels.x = nums.value

def update(attr, old, new):
update_source()
update_glyph()
r.children[1] = update_glyph()

catlist_u = df[‘category’].unique().tolist()
subcatlist_u = df[‘subcategory’].unique().tolist()

cats = MultiSelect(title=‘Category’, value=[‘f’], options=catlist_u)

subcats = MultiSelect(title=‘Subcategory’, value=[‘a’],
options=subcatlist_u)

nums = Select(title=‘Value’, value=‘number2’, options=[‘number’, ‘number2’])

cats.on_change(‘value’, update)
subcats.on_change(‘value’, update)
nums.on_change(‘value’, update)

w = widgetbox([cats, subcats, nums])

r = row([w, p], sizing_mode=“scale_width”)

curdoc().add_root(r)
curdoc().title = “test”

Thanks in advance!

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neuron878 · February 5, 2018, 3:17pm

Hi Bryan,

Just wondering if you’ve had a chance to read my latest response and if you have any other suggestions?

Thanks!

···

On Wednesday, January 31, 2018 at 9:43:40 AM UTC-6, [email protected] wrote:

Good idea with those print statements. However, nothing strikes me as suspicious. After changing the value in the browser to “number2”, the source and glyph attributes appear to be set correctly:

In [5]: print(“source.data”)
…: pp(source.data)