Como nomear para o menu suspenso em Dash / Plotly

Question

Eu sou muito novo no Dash e estou tentando descobrir como coloco nomes acima de meus menus suspensos e controles deslizantes e forneço algum espaço entre eles. Estou recebendo esses nomes "Conjunto de dados", "tipos de modelo" na lateral em vez de na parte superior dos menus suspensos. Este é o código que venho usando:

    html.Div(className='row', children=[
        html.Label(['Dataset:'], style={'font-weight': 'bold', "text-align": "center"}),

 
        html.Div(className='three columns', children=dcc.Dropdown(
            id='dropdown-dataset',
            options=[
                {'label': 'Diabetes', 'value': 'diabetes'},
                {'label': 'Boston Housing', 'value': 'boston'},
                {'label': 'Sine Curve', 'value': 'sin'}

            ],
            value='diabetes',
            searchable=False,
            clearable=False,

        ), style=dict(width='33%')),

        html.Label(['Model Type'], style={'font-weight': 'bold', "text-align": "center"}),
        html.Div(className='three columns', children=dcc.Dropdown(
            id='dropdown-select-model',
            options=[
                {'label': 'Linear Regression', 'value': 'linear'},
                {'label': 'Lasso', 'value': 'lasso'},
                {'label': 'Ridge', 'value': 'ridge'},
                {'label': 'Polynomial', 'value': 'polynomial'},
                {'label': 'elastic-net', 'value': 'elastic-net'},

            ],
            value='linear',
            searchable=False,
            clearable=False
        ),style=dict(width='33%')),

        html.Label(['Add data'], style={'font-weight': 'bold', "text-align": "center"}),
        html.Div(className='three columns', children=dcc.Dropdown(
            id='dropdown-custom-selection',
            options=[
                {'label': 'Add Training Data', 'value': 'training'},
                {'label': 'Add Test Data', 'value': 'test'},
                {'label': 'Remove Data point', 'value': 'remove'},
            ],
            value='training',
            clearable=False,
            searchable=False
        ),style=dict(width='33%')),
    ],style=dict(display='flex')),

Alguém pode apontar onde estou errado?

Editar:

Eu adicionei o seguinte trecho de código antes de meu primeiro menu suspenso e removi cada html.Label antes de cada div e isso funciona. Não tenho certeza se esta é a abordagem certa:

html.Div(className='row', children=[
      html.Div([
        html.Label(['Select Dataset'], style={'font-weight': 'bold', "text-align": "right","offset":1}),
    ], style=dict(width='33%')),

        html.Div([
                    html.Label(['Select Model'], style={'font-weight': 'bold', "text-align": "center"}),
            ], style=dict(width='33%')),
        html.Div([
                    html.Label(['Add Custom Data'], style={'font-weight': 'bold',"text-align": "left"}),
            ], style=dict(width='33%')),
            ],style=dict(display='flex',justifyContent='center')),

Answer 1

Você define

# row
Div([
   Label(),
   Div([Dropdown()], width='33%')  # column
   Label(),
   Div([Dropdown()], width='33%')  # column
   Label(),
   Div([Dropdown()], width='33%')  # column
])

# row
Div([
   Div([Slide()], width='33%')  # column
   Div([Slide()], width='33%')  # column
   Div([Slide()], width='33%')  # column
])

Mas eu proponho

# row
Div([
   Div([Label(),Dropdown(),Label(),Slide()], width='33%')  # column
   Div([Label(),Dropdown(),Label(),Slide()], width='33%')  # column
   Div([Label(),Dropdown(),Label(),Slide()], width='33%')  # column
])

ou pelo menos

# row
Div([
   Div([Label(),Dropdown()], width='33%')  # column
   Div([Label(),Dropdown()], width='33%')  # column
   Div([Label(),Dropdown()], width='33%')  # column
])

# row
Div([
   Div([Label(),Slide()], width='33%')  # column
   Div([Label(),Slide()], width='33%')  # column
   Div([Label(),Slide()], width='33%')  # column
])

---

Código de trabalho mínimo.

Eu removi className="three columns"para remover as lacunas entre as colunas e usei width="33.33%"para usar melhor a largura.

import dash
import dash_core_components as dcc
import dash_html_components as html
import plotly.express as px
import pandas as pd

external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']

app = dash.Dash(__name__, external_stylesheets=external_stylesheets)

app.layout = html.Div(
    
    html.Div(className='row', children=[
        
        html.Div(children=[
                html.Label(['Dataset:'], style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Dropdown(
                    id='dropdown-dataset',
                    options=[
                        {'label': 'Diabetes', 'value': 'diabetes'},
                        {'label': 'Boston Housing', 'value': 'boston'},
                        {'label': 'Sine Curve', 'value': 'sin'}

                    ],
                    value='diabetes',
                    searchable=False,
                    clearable=False,
                ),
                html.Label('Slider', style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Slider(
                    min=0,
                    max=9,
                    marks={i: 'Label {}'.format(i) if i == 1 else str(i) for i in range(1, 6)},
                    value=5,
                ),
            ], style=dict(width='33.33%')),

        
        html.Div(children=[
                html.Label(['Model Type'], style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Dropdown(
                    id='dropdown-select-model',
                    options=[
                        {'label': 'Linear Regression', 'value': 'linear'},
                        {'label': 'Lasso', 'value': 'lasso'},
                        {'label': 'Ridge', 'value': 'ridge'},
                        {'label': 'Polynomial', 'value': 'polynomial'},
                        {'label': 'elastic-net', 'value': 'elastic-net'},

                    ],
                    value='linear',
                    searchable=False,
                    clearable=False
                ),
                html.Label('Slider', style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Slider(
                    min=0,
                    max=9,
                    marks={i: 'Label {}'.format(i) if i == 1 else str(i) for i in range(1, 6)},
                    value=5,
                ),
            ],style=dict(width='33.33%')),

        html.Div(children=[
                html.Label(['Add data'], style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Dropdown(
                    id='dropdown-custom-selection',
                    options=[
                        {'label': 'Add Training Data', 'value': 'training'},
                        {'label': 'Add Test Data', 'value': 'test'},
                        {'label': 'Remove Data point', 'value': 'remove'},
                    ],
                    value='training',
                    clearable=False,
                    searchable=False
                ),
                html.Label('Slider', style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Slider(
                    min=0,
                    max=9,
                    marks={i: 'Label {}'.format(i) if i == 1 else str(i) for i in range(1, 6)},
                    value=5,
                ),
            ],style=dict(width='33.33%')),
    ],style=dict(display='flex')),
)

if __name__ == '__main__':
    app.run_server(debug=True, port=8080)

---

Arquivo CSS usado em threads de código com largura total de 12 colunas (semelhante a outros frameworks CSS - isto é Bootstrap), então se você deseja criar 3 colunas com lacunas, você deve usar o nameClass="four columns"que significa "quatro de 12 colunas" e 4/12dá largura 1/3- e então você não tem que usarstyle=dict(width='33.33%')

import dash
import dash_core_components as dcc
import dash_html_components as html
import plotly.express as px
import pandas as pd

external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']

app = dash.Dash(__name__, external_stylesheets=external_stylesheets)

app.layout = html.Div(
    
    html.Div(className='row', children=[
        
        html.Div(className="four columns", children=[
                html.Label(['Dataset:'], style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Dropdown(
                    id='dropdown-dataset',
                    options=[
                        {'label': 'Diabetes', 'value': 'diabetes'},
                        {'label': 'Boston Housing', 'value': 'boston'},
                        {'label': 'Sine Curve', 'value': 'sin'}

                    ],
                    value='diabetes',
                    searchable=False,
                    clearable=False,
                ),
                html.Label('Slider', style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Slider(
                    min=0,
                    max=9,
                    marks={i: 'Label {}'.format(i) if i == 1 else str(i) for i in range(1, 6)},
                    value=5,
                ),
            ]),

        
        html.Div(className="four columns", children=[
                html.Label(['Model Type'], style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Dropdown(
                    id='dropdown-select-model',
                    options=[
                        {'label': 'Linear Regression', 'value': 'linear'},
                        {'label': 'Lasso', 'value': 'lasso'},
                        {'label': 'Ridge', 'value': 'ridge'},
                        {'label': 'Polynomial', 'value': 'polynomial'},
                        {'label': 'elastic-net', 'value': 'elastic-net'},

                    ],
                    value='linear',
                    searchable=False,
                    clearable=False
                ),
                html.Label('Slider', style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Slider(
                    min=0,
                    max=9,
                    marks={i: 'Label {}'.format(i) if i == 1 else str(i) for i in range(1, 6)},
                    value=5,
                ),
            ]),

        html.Div(className="four columns", children=[
                html.Label(['Add data'], style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Dropdown(
                    id='dropdown-custom-selection',
                    options=[
                        {'label': 'Add Training Data', 'value': 'training'},
                        {'label': 'Add Test Data', 'value': 'test'},
                        {'label': 'Remove Data point', 'value': 'remove'},
                    ],
                    value='training',
                    clearable=False,
                    searchable=False
                ),
                html.Label('Slider', style={'font-weight': 'bold', "text-align": "center"}),
                dcc.Slider(
                    min=0,
                    max=9,
                    marks={i: 'Label {}'.format(i) if i == 1 else str(i) for i in range(1, 6)},
                    value=5,
                ),
            ]),
    ],style=dict(display='flex')),
)

if __name__ == '__main__':
    app.run_server(debug=True, port=8080)

---

EDITAR:

Claro, você também pode organizá-lo em linhas separadas (se isso ajudar)

# row
Div([
   Div([Label()], width='33%')  # column
   Div([Label()], width='33%')  # column
   Div([Label()], width='33%')  # column
])

# row
Div([
   Div([Dropdown()], width='33%')  # column
   Div([Dropdown()], width='33%')  # column
   Div([Dropdown()], width='33%')  # column
])

# row
Div([
   Div([Label()], width='33%')  # column
   Div([Label()], width='33%')  # column
   Div([Label()], width='33%')  # column
])

# row
Div([
   Div([Slide()], width='33%')  # column
   Div([Slide()], width='33%')  # column
   Div([Slide()], width='33%')  # column
])