There is code which has to show on map some data by let's say some number(year) and problem is that CustomJs not even calling and data on slider doesn't work
def json_data(selectedYear):
yr = selectedYear
df_yr = df[df['year'] == yr]
merged = gdf.merge(df_yr, left_on='country_code', right_on='code', how='left')
merged.fillna('0', inplace=True)
merged_json = json.loads(merged.to_json())
json_data = json.dumps(merged_json)
return json_data
geosource = GeoJSONDataSource(geojson=json_data(61))
palette = brewer['YlGnBu'][8]
palette = palette[::-1]
color_mapper = LinearColorMapper(palette=palette, low=0, high=40, nan_color='#d9d9d9')
tick_labels = {'0': '0%', '5': '5%', '10': '10%', '15': '15%', '20': '20%', '25': '25%','30': '30%', '35': '35%','40': '>40%'}
hover = HoverTool(tooltips=[('Country/region', '@country'), ('% obesity', '@per_cent_obesity')])
color_bar = ColorBar(color_mapper=color_mapper, label_standoff=8, width=500, height=20,
border_line_color=None, location=(0, 0), orientation='horizontal',
major_label_overrides=tick_labels)
p = figure(title='Share of adults who are obese, 2016', plot_height=600, plot_width=950, toolbar_location=None,
tools=[hover])
p.xgrid.grid_line_color = None
p.ygrid.grid_line_color = None
p.patches('xs', 'ys', source=geosource, fill_color={'field': 'per_cent_obesity', 'transform': color_mapper},
line_color='black', line_width=0.25, fill_alpha=1)
p.add_layout(color_bar, 'below')
slider = Slider(title='Year', start=-21, end=61, step=1, value=61)
updatee = CustomJS(args=dict(slider=slider,source=geosource), code="""
const yr = slider.value;
const new_data = json_data(yr);
const geosource.geojson = new_data;
const p.title.text = 'Share of adults who are obese, %d' % yr;
geosource.change.emit();
""")
but if I use instead of updatee this method:
def update_plot(attr, old, new):
yr = slider.value
new_data = json_data(yr)
geosource.geojson = new_data
p.title.text = 'Share of adults who are obese, %d' % yr
Slider value is changing but data isn't
slider.js_on_change('value', updatee)
layout = column(p, Column(slider))
curdoc().add_root(layout)
output_file("output_file_text.html")
show(layout)
