dash-tutorial/dash-tutorial-6.py at master · davinderpank/dash-tutorial · GitHub

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import dash
import dash_core_components as dcc
import dash_html_components as html
import pandas as pd
import plotly.graph_objs as go

app = dash.Dash()

df = pd.read_csv('https://gist.githubusercontent.com/chriddyp/cb5392c35661370d95f300086accea51/raw/' +
    '8e0768211f6b747c0db42a9ce9a0937dafcbd8b2/indicators.csv')

available_indicators = df['Indicator Name'].unique()

app.layout = html.Div([
    html.Div([

        html.Div([

            dcc.Dropdown(
                id='xaxis-column',
                options=[{'label': i, 'value': i} for i in available_indicators],
                value='Fertility rate, total (births per woman)'
            ),
            dcc.RadioItems(
                id='xaxis-type',
                options=[{'label': i, 'value': i} for i in ['Linear', 'Log']],
                value='Linear',
                labelStyle={'display': 'inline-block'}
            )
        ], style={'width': '48%', 'display': 'inline-block'}),

        html.Div([

            dcc.Dropdown(
                id='yaxis-column',
                options=[{'label': i, 'value': i} for i in available_indicators],
                value='Life expectancy at birth, total (years)'
            ),
            dcc.RadioItems(
                id='yaxis-type',
                options=[{'label': i, 'value': i} for i in ['Linear', 'Log']],
                value='Linear',
                labelStyle={'display': 'inline-block'}
            )
        ], style={'width': '48%', 'display': 'inline-block'})
    ]),

    dcc.Graph(id='indicator-graphic'),

    dcc.Slider(
        id='year-slider',
        min=df['Year'].min(),
        max=df['Year'].max(),
        value=df['Year'].max(),
        step=None,
        marks={str(year): str(year) for year in df['Year'].unique()}
    )
])

@app.callback(
    dash.dependencies.Output('indicator-graphic', 'figure'),
    [dash.dependencies.Input('xaxis-column', 'value'),
     dash.dependencies.Input('yaxis-column', 'value'),
     dash.dependencies.Input('xaxis-type', 'value'),
     dash.dependencies.Input('yaxis-type', 'value'),
     dash.dependencies.Input('year-slider', 'value')])
def update_graph(xaxis_column_name, yaxis_column_name, xaxis_type, yaxis_type, year_value):
    dff = df[df['Year'] == year_value]

    return {
        'data': [go.Scatter(
            x=dff[dff['Indicator Name'] == xaxis_column_name]['Value'],
            y=dff[dff['Indicator Name'] == yaxis_column_name]['Value'],
            text=dff[dff['Indicator Name'] == yaxis_column_name]['Country Name'],
            mode='markers',
            marker={'size': 15, 'opacity': 0.5, 'line': {'width': 0.5, 'color': 'white'}}
        )],
        'layout': go.Layout(
            xaxis={'title': xaxis_column_name, 'type': 'linear' if xaxis_type == 'Linear' else 'log'},
            yaxis={'title': yaxis_column_name, 'type': 'linear' if yaxis_type == 'Linear' else 'log'},
            margin={'l': 40, 'b': 40, 't': 10, 'r': 0},
            hovermode='closest'
        )
    }

if __name__ == '__main__':
    app.run_server()