Source.trigger Warning

Community Support
1

Hello Everyone…I am facing some difficulty in source.trigger…Its not showing any error and showing a warning -ColumnDataSource’s columns must be of the same length. Current lengths: (‘x’, 0), (‘y’, 3)
Please help me out to solve this warning message

Here is the code :-

#importing numpy and pandas

import numpy as np

import pandas as pd

#importing Bokeh Library and files

from bokeh.io import show, output_file

from bokeh.io import curdoc

from bokeh.models import ColumnDataSource, Select

from bokeh.plotting import figure

from bokeh.layouts import layout, widgetbox, column, row, gridplot

from bokeh.models import HoverTool,LassoSelectTool,WheelZoomTool,BoxZoomTool,ResetTool,PanTool

from bokeh.palettes import GnBu3, OrRd3

from bokeh.plotting import reset_output

#defining source variable

source = ColumnDataSource({‘x’: , ‘y’: })

i=1

X=

def update():

global i

x=[2,3,4]

global X

X=[i*n for n in x]

print(X)

i=i/1.1

data2 = source.data

data2['y']= [0.5,1.5,2.5]

source.trigger('data',...,data2)

data1 = source.data

data1['x'] = X

source.trigger('data',...,data1)

curdoc().add_periodic_callback(update,10000)

#HORIZONTAL BAR PLOT

fig= figure(plot_width=1000,plot_height=300,x_axis_label=‘k’,title='Power ',toolbar_location=“above”,tools="")

fig.hbar(y=‘y’, right=‘x’,height=0.4,color=OrRd3[1],source=source)

curdoc().add_root(fig)

curdoc().title = “Live updating”

2

Hi,

Try this:

source.data.update(x=X, y=[0.5, 1.5, 2.5])

There’s no need to use multiple steps and trigger on Python side.

Regards,

Eugene

···

On Tuesday, November 28, 2017 at 11:05:40 AM UTC+7, sai jena wrote:

Hello Everyone…I am facing some difficulty in source.trigger…Its not showing any error and showing a warning -ColumnDataSource’s columns must be of the same length. Current lengths: (‘x’, 0), (‘y’, 3)
Please help me out to solve this warning message

Here is the code :-

#importing numpy and pandas

import numpy as np

import pandas as pd

#importing Bokeh Library and files

from bokeh.io import show, output_file

from bokeh.io import curdoc

from bokeh.models import ColumnDataSource, Select

from bokeh.plotting import figure

from bokeh.layouts import layout, widgetbox, column, row, gridplot

from bokeh.models import HoverTool,LassoSelectTool,WheelZoomTool,BoxZoomTool,ResetTool,PanTool

from bokeh.palettes import GnBu3, OrRd3

from bokeh.plotting import reset_output

#defining source variable

source = ColumnDataSource({‘x’: , ‘y’: })

i=1

X=

def update():

global i

x=[2,3,4]

global X

X=[i*n for n in x]

print(X)

i=i/1.1

data2 = source.data

data2[‘y’]= [0.5,1.5,2.5]

source.trigger(‘data’,…,data2)

data1 = source.data

data1[‘x’] = X

source.trigger(‘data’,…,data1)

curdoc().add_periodic_callback(update,10000)

#HORIZONTAL BAR PLOT

fig= figure(plot_width=1000,plot_height=300,x_axis_label=‘k’,title='Power ',toolbar_location=“above”,tools=“”)

fig.hbar(y=‘y’, right=‘x’,height=0.4,color=OrRd3[1],source=source)

curdoc().add_root(fig)

curdoc().title = “Live updating”

3

It works perfectly…Thanks @Eugene

···

On Tuesday, November 28, 2017 at 9:52:36 AM UTC+5:30, Eugene Pakhomov wrote:

Hi,

Try this:

source.data.update(x=X, y=[0.5, 1.5, 2.5])

There’s no need to use multiple steps and trigger on Python side.

Regards,

Eugene

On Tuesday, November 28, 2017 at 11:05:40 AM UTC+7, sai jena wrote:

Hello Everyone…I am facing some difficulty in source.trigger…Its not showing any error and showing a warning -ColumnDataSource’s columns must be of the same length. Current lengths: (‘x’, 0), (‘y’, 3)
Please help me out to solve this warning message

Here is the code :-

#importing numpy and pandas

import numpy as np

import pandas as pd

#importing Bokeh Library and files

from bokeh.io import show, output_file

from bokeh.io import curdoc

from bokeh.models import ColumnDataSource, Select

from bokeh.plotting import figure

from bokeh.layouts import layout, widgetbox, column, row, gridplot

from bokeh.models import HoverTool,LassoSelectTool,WheelZoomTool,BoxZoomTool,ResetTool,PanTool

from bokeh.palettes import GnBu3, OrRd3

from bokeh.plotting import reset_output

#defining source variable

source = ColumnDataSource({‘x’: , ‘y’: })

i=1

X=

def update():

global i

x=[2,3,4]

global X

X=[i*n for n in x]

print(X)

i=i/1.1

data2 = source.data

data2['y']= [0.5,1.5,2.5]

source.trigger('data',...,data2)

data1 = source.data

data1['x'] = X

source.trigger('data',...,data1)

curdoc().add_periodic_callback(update,10000)

#HORIZONTAL BAR PLOT

fig= figure(plot_width=1000,plot_height=300,x_axis_label=‘k’,title='Power ',toolbar_location=“above”,tools=“”)

fig.hbar(y=‘y’, right=‘x’,height=0.4,color=OrRd3[1],source=source)

curdoc().add_root(fig)

curdoc().title = “Live updating”