python - Access data from bokeh widgets in a jupyter notebook -


i want use text input widget in jupyter notebook autocompletion. therefore used autocompleteinput() bokeh.models.widgets.inputs.

from bokeh.models.widgets.inputs import autocompleteinput bokeh.io import output_notebook bokeh.plotting import show  output_notebook()  txt_input = autocompleteinput(completions=['val1', 'val2']) show(txt_input)

displaying widget , autocompletion works fine, how can access value of input widget upon change? txt_input.value returns default value (an empty string).

as of bokeh 0.12.3, fuller integration of bokeh widgets in jupyter notebook still open issue.

however, there workarounds, though may considered clunky. here customjs callback can pass widget set value of python value:

from bokeh.models import customjs  callback = customjs(code=""" if (ipython.notebook.kernel !== undefined) {     var kernel = ipython.notebook.kernel;     cmd = "widget_value = '" + cb_obj.value + "'";     kernel.execute(cmd, {}, {}); } """)

the result looks like:

enter image description here

the value of cmd variable in customjs code string of python code executed in running jupyter kernel. if need call python function, e.g., too.


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