Function bkapp

test/11.charts.py:18–57

(doc)

def bkapp(doc):
    import yaml

    from bokeh.layouts import column
    from bokeh.models import ColumnDataSource, Slider
    from bokeh.plotting import figure
    from bokeh.sampledata.sea_surface_temperature import sea_surface_temperature
    from bokeh.themes import Theme
    df = sea_surface_temperature.copy()
    source = ColumnDataSource(data=df)

    plot = figure(x_axis_type='datetime', y_range=(0, 25),
                  y_axis_label='Temperature (Celsius)',
                  title="Sea Surface Temperature at 43.18, -70.43")
    plot.line('time', 'temperature', source=source)

    def callback(attr, old, new):
        if new == 0:
            data = df
        else:
            data = df.rolling('{0}D'.format(new)).mean()
        source.data = ColumnDataSource.from_df(data)

    slider = Slider(start=0, end=30, value=0, step=1, title="Smoothing by N Days")
    slider.on_change('value', callback)

    doc.add_root(column(slider, plot))

    doc.theme = Theme(json=yaml.load("""
       attrs:
           Figure:
               background_fill_color: "#DDDDDD"
               outline_line_color: white
               toolbar_location: above
               height: 500
               width: 800
           Grid:
               grid_line_dash: [6, 4]
               grid_line_color: white
   """, Loader=yaml.FullLoader))


def basci_doc():