Pandas, Bokeh, CustomJS(), dropdown

I am relatively new to Python. I have been reading over the documentation for a couple days, but I just can’t seem to get this to work.

I have a panda with 3 columns [code, date, value]. I would like to create a dropdown with a line chart base on the ‘code’ column.

I can create individual plots:

import pandas as pd

from bokeh.models import Callback, ColumnDataSource, Rect, Select,CustomJS

from bokeh.plotting import figure, output_file, show, gridplot

from bokeh.models.widgets.layouts import VBox,HBox


#Plot for one code

GDP_temp = GDP[(GDP[‘code’]==‘A006RY2’)]

p1 = figure(width=600, height=300, title=GDP_temp[‘code’].iloc[0], x_axis_type=“datetime”)

p1.line(GDP_temp[‘date’], GDP_temp[‘value’])



And a plot for each code:

#Plot for each code

for something in GDP[‘code’].unique():

temp_GDP = GDP[(GDP[‘code’]==something)]

p1 = figure(width=600, height=300, title=temp_GDP[‘code’].iloc[0], x_axis_type=“datetime”)

p1.line(temp_GDP[‘date’], temp_GDP[‘value’])


What steps am I missing for a simple drop down by code?

Callback_code = CustomJS()

#Use the Select widget

dropdown_code = Select(title=“Code”, value=GDP[‘value’], callback = Callback_code)

#Display data

filters = VBox(dropdown_code)

tot = HBox(filters, gridplot([[p1]]))