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A dropdown for sales by country

As you were working away at your desk, the global sales manager from the e-commerce company stopped by with a new challenge. She liked the recent sales graphs you created, but wants to filter by country and see the category data update live.

She emphasized using the approved country names: United Kingdom, Germany, France, Australia, and Hong Kong.

🛑 Note: You may need to enter Full screen mode to view the dashboard correctly with all elements side-by-side.

Diese Übung ist Teil des Kurses

Building Dashboards with Dash and Plotly

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Anleitung zur Übung

  • Add a dropdown component called dcc.Dropdown with an identifier of country_dd below line 16 to be used in a callback.
  • Set the input and output of the callback below line 30 to connect the country_dd dropdown to the major_cat graph.

Interaktive Übung

Versuche dich an dieser Übung, indem du diesen Beispielcode vervollständigst.

from dash import Dash, dcc, html, Input, Output, callback
import plotly.express as px
import pandas as pd
ecom_sales = pd.read_csv('/usr/local/share/datasets/ecom_sales.csv')
logo_link = 'https://assets.datacamp.com/production/repositories/5893/datasets/fdbe0accd2581a0c505dab4b29ebb66cf72a1803/e-comlogo.png'

app = Dash()

app.layout = [
    html.Img(src=logo_link, style={'margin': '30px 0px 0px 0px'}),
    html.H1('Sales breakdowns'),
    html.Div([
        html.H2('Controls'),
        html.Br(),
        html.H3('Country Select'),
        # Add a dropdown with identifier
        dcc.____(
            ____='country_dd',
            options=['United Kingdom', 'Germany', 'France', 'Australia', 'Hong Kong'],
            style={'width': '200px', 'margin': '0 auto'})],
      	style={'width': '350px', 'height': '350px', 'display': 'inline-block', 'vertical-align': 'top', 'border': '1px solid black', 'padding': '20px'}),
    html.Div([
        dcc.Graph(id='major_cat'),
        html.H2('Major Category', style={'border': '2px solid black', 'width': '200px', 'margin': '0 auto'})],
        style={'width': '700px', 'display': 'inline-block'})
]


@callback(
    # Set the input and output of the callback to link the dropdown to the graph
    ____(component_id='____', component_property='____'),
    ____(component_id='____', component_property='____')
)

def update_plot(input_country):
    country_filter = 'All Countries'
    sales = ecom_sales.copy(deep=True)
    if input_country:
        country_filter = input_country
        sales = sales[sales['Country'] == country_filter]
    ecom_bar_major_cat = sales.groupby('Major Category')['OrderValue'].agg('sum').reset_index(name='Total Sales ($)')
    bar_fig_major_cat = px.bar(
        title=f'Sales in {country_filter}', data_frame=ecom_bar_major_cat, x='Total Sales ($)', y='Major Category', color='Major Category',
                 color_discrete_map={'Clothes':'blue','Kitchen':'red','Garden':'green','Household':'yellow'})
    return bar_fig_major_cat


if __name__ == '__main__':
    app.run(debug=True)
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