Tabelas interativas no painel de vendas
O painel de vendas evoluiu muito desde que você começou.
O dashboard foi compartilhado amplamente na empresa e recebeu avaliações bem positivas. No entanto, chegaram alguns pedidos para tornar o componente de tabela mais interativo. Pediram para adicionar a capacidade de selecionar uma determinada coluna e fazer com que isso altere o eixo no gráfico de dispersão abaixo.
Este exercício faz parte do curso
Construindo Dashboards com Dash e Plotly
Instruções do exercício
- Habilite a seleção de linha única na
griddefinindo o parâmetrorowSelectionabaixo da linha25. - Crie um callback abaixo da linha
63que useselectedRowsdemy_gridpara atualizar a figurascatter_compare, destacando o país selecionado como um ponto vermelho grande.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
from dash import Dash, dcc, html, Input, Output, callback
import plotly.express as px
import pandas as pd
from dash_ag_grid import AgGrid
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'
major_categories = list(ecom_sales['Major Category'].unique())
large_tb = ecom_sales.groupby(['Country'])['OrderValue'].agg(['sum', 'count', 'mean', 'median']).reset_index().rename(columns={'count':'Sales Volume', 'sum':'Total Sales ($)', 'mean':'Average Order Value ($)', 'median':'Median Order Value ($)'})
ecom_country = ecom_sales.groupby('Country')['OrderValue'].agg('sum').reset_index(name='Total Sales ($)')
bar_fig_country = px.bar(ecom_country, x='Total Sales ($)', y='Country', width=500, height=450, title='Total Sales by Country (Hover to filter the Minor Category bar chart!)', custom_data=['Country'], color='Country', color_discrete_map={'United Kingdom':'lightblue', 'Germany':'orange', 'France':'darkblue', 'Australia':'green', 'Hong Kong':'pink'})
money_fmt = {"function": ("params.value.toLocaleString('en-US', {style: 'currency', currency: 'USD'})")}
column_defs = [
{"field": "Country"},
{"field": "Total Sales ($)", "valueFormatter": money_fmt},
{"field": "Average Order Value ($)", "valueFormatter": money_fmt},
{"field": "Median Order Value ($)", "valueFormatter": money_fmt},
{"field": "Sales Volume"},
]
grid = AgGrid(
id="my_grid",
columnDefs=column_defs,
rowData=large_tb.to_dict("records"),
# Enable single-row selection
dashGridOptions={"____": "____"},
defaultColDef={
"cellStyle": {
"textAlign": "left",
"backgroundColor": "black",
"color": "white"}}
)
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('Major Category Select'),
dcc.Dropdown(id='major_cat_dd',
options=[{'label':category, 'value':category} for category in major_categories],
style={'width':'200px', 'margin':'0 auto'}),
html.Br(),
html.H3('Minor Category Select'),
dcc.Dropdown(id='minor_cat_dd', style={'width':'200px', 'margin':'0 auto'})],
style={'width':'350px', 'height':'360px', 'display':'inline-block', 'vertical-align':'top', 'border':'1px solid black', 'padding':'20px'}),
html.Div([
html.H3(id='chosen_major_cat_title'),
dcc.Graph(id='sales_line')],
style={'width':'700px', 'height':'380px','display':'inline-block', 'margin-bottom':'5px'}),
grid,
html.Br(),
html.Div([
dcc.Graph(id='scatter_compare'),
dcc.Graph(id='major_cat', figure=bar_fig_country, style={'display':'inline-block'}),
dcc.Graph(id='minor_cat', style={'display':'inline-block'})],
style={'width':'1000px', 'height':'650px','display':'inline-block'})
]
# Create a callback with the right input
@callback(
Output('scatter_compare', 'figure'),
Input('my_grid', '____')
)
def update_scatter(selected_rows):
fig = px.scatter(
large_tb,
x='Sales Volume',
y='Total Sales ($)',
color='Country',
title='Sales Volume vs Total Sales ($) — click a row to highlight')
if selected_rows:
sel_df = pd.DataFrame(selected_rows)
highlight = px.scatter(
sel_df,
x='Sales Volume',
y='Total Sales ($)',
color_discrete_sequence=['#ff0000'],
size=[15] * len(sel_df))
fig.add_trace(highlight.data[0])
return fig
@callback(
Output('minor_cat_dd', 'options'),
Output('chosen_major_cat_title', 'children'),
Input('major_cat_dd', 'value'))
def update_dd(major_cat_dd):
major_minor = ecom_sales[['Major Category', 'Minor Category']].drop_duplicates()
relevant_minor = major_minor[major_minor['Major Category'] == major_cat_dd]['Minor Category'].values.tolist()
minor_options = [dict(label=x, value=x) for x in relevant_minor]
if not major_cat_dd:
major_cat_dd = 'ALL'
major_cat_title = f'This is in the Major Category of : {major_cat_dd}'
return minor_options, major_cat_title
@callback(
Output('sales_line', 'figure'),
Input('minor_cat_dd', 'value'))
def update_line(minor_cat):
minor_cat_title = 'All'
ecom_line = ecom_sales.copy()
if minor_cat:
minor_cat_title = minor_cat
ecom_line = ecom_line[ecom_line['Minor Category'] == minor_cat]
ecom_line = ecom_line.groupby('Year-Month')['OrderValue'].agg('sum').reset_index(name='Total Sales ($)')
line_graph = px.line(ecom_line, x='Year-Month', y='Total Sales ($)', title=f'Total Sales by Month for Minor Category: {minor_cat_title}', height=350)
return line_graph
@callback(
Output('minor_cat', 'figure'),
Input('major_cat', 'hoverData'))
def update_min_cat_hover(hoverData):
hover_country = 'Australia'
if hoverData:
hover_country = hoverData['points'][0]['customdata'][0]
minor_cat_df = ecom_sales[ecom_sales['Country'] == hover_country]
minor_cat_agg = minor_cat_df.groupby('Minor Category')['OrderValue'].agg('sum').reset_index(name='Total Sales ($)')
ecom_bar_minor_cat = px.bar(minor_cat_agg, x='Total Sales ($)', y='Minor Category', orientation='h', height=450, width=480,title=f'Sales by Minor Category for: {hover_country}')
ecom_bar_minor_cat.update_layout({'yaxis':{'dtick':1, 'categoryorder':'total ascending'}, 'title':{'x':0.5}})
return ecom_bar_minor_cat
if __name__ == '__main__':
app.run(debug=True)