DatVis_Bokeh_CaseStudy_App_Build_5.py 文件源码

def update_plot(attr, old, new):
    # Assign the value of the slider: yr
    yr = slider.value
    # Set new_data
    new_data = {
        'x'       : data.loc[yr].fertility,
        'y'       : data.loc[yr].life,
        'country' : data.loc[yr].Country,
        'pop'     : (data.loc[yr].population / 20000000) + 2,
        'region'  : data.loc[yr].region,
    }
    # Assign new_data to: source.data
    source.data = new_data

    # Add title to figure: plot.title.text
    plot.title.text = 'Gapminder data for %d' % yr

# Make a slider object: slider