python - Bokeh TableData on_change selected event called twice -


i have bokeh ui select, datatable , button.

  • select allows go directly given line in datatable
  • button allows go next line in datatable
  • datatable allows direct single line selection (hence updates select).

datatable keeps tracking on selection change event through:

self.__table_data.on_change('selected',self.table_selection_change)

when button clicked, change selected attribute of datatable source new dict structure seen here:

self.__table_data.selected = {'2d': {'indices': []}, '1d': {'indices': [my_new_index]}, '0d': {'indices': [], 'glyph': none}}

problem is, when did update, callback (table_selection_change) called twice while expect 1 call.

problem whole dict should not updated. relevant keys must updated.

replacing 

self.__table_data.selected = {'2d': {'indices': []}, '1d': {'indices': [my_new_index]}, '0d': {'indices': [], 'glyph': none}}

by

self.__table_data.selected['1d'] = {'indices':[my_new_index]}

solves problem.


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