python開(kāi)發(fā)實(shí)時(shí)可視化儀表盤(pán)的示例

import dash
import dash_core_components as dcc
import dash_bootstrap_components as dbc
from dash.dependencies import Input, Output

app = dash.Dash(__name__)

app.layout = dbc.Container(
    [
        dbc.Form(
            [
                dbc.FormGroup(
                    [
                        dbc.Label('storage = "memory"時(shí)'),
                        dbc.Input(id='input-memory1', autoComplete='off'),
                        dbc.Input(id='input-memory2', style={'margin-top': '3px'}),
                        dcc.Store(id='data-in-memory')
                    ]
                ),
                dbc.FormGroup(
                    [
                        dbc.Label('storage = "session"時(shí)'),
                        dbc.Input(id='input-session1', autoComplete='off'),
                        dbc.Input(id='input-session2', style={'margin-top': '3px'}),
                        dcc.Store(id='data-in-session', storage_type='session')
                    ]
                ),
                dbc.FormGroup(
                    [
                        dbc.Label('storage = "local"時(shí)'),
                        dbc.Input(id='input-local1', autoComplete='off'),
                        dbc.Input(id='input-local2', style={'margin-top': '3px'}),
                        dcc.Store(id='data-in-local', storage_type='local')
                    ]
                ),
            ]
        )
    ],
    style={
        'margin-top': '100px',
        'max-width': '600px'
    }
)


# memory對(duì)應(yīng)回調(diào)
@app.callback(
    Output('data-in-memory', 'data'),
    Input('input-memory1', 'value')
)
def data_in_memory_save_data(value):
    if value:
        return value

    return dash.no_update


@app.callback(
    Output('input-memory2', 'placeholder'),
    Input('data-in-memory', 'data')
)
def data_in_memory_placeholder(data):
    if data:
        return data

    return dash.no_update


# session對(duì)應(yīng)回調(diào)
@app.callback(
    Output('data-in-session', 'data'),
    Input('input-session1', 'value')
)
def data_in_session_save_data(value):
    if value:
        return value

    return dash.no_update


@app.callback(
    Output('input-session2', 'placeholder'),
    Input('data-in-session', 'data')
)
def data_in_session_placeholder(data):
    if data:
        return data

    return dash.no_update


# local對(duì)應(yīng)回調(diào)
@app.callback(
    Output('data-in-local', 'data'),
    Input('input-local1', 'value')
)
def data_in_local_save_data(value):
    if value:
        return value

    return dash.no_update


@app.callback(
    Output('input-local2', 'placeholder'),
    Input('data-in-local', 'data')
)
def data_in_local_placeholder(data):
    if data:
        return data

    return dash.no_update


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

import dash
import numpy as np
import dash_core_components as dcc
import dash_html_components as html
import dash_bootstrap_components as dbc
from dash.dependencies import Input, Output, State

app = dash.Dash(__name__)

app.layout = dbc.Container(
    [
        html.P(
            [
                html.Strong('貴州茅臺(tái)(600519)'),
                '最新股價(jià)：',
                html.Span('2108.94', id='latest-price')
            ]
        ),
        dcc.Interval(id='demo-interval', interval=1000)
    ],
    style={
        'margin-top': '100px'
    }
)


@app.callback(
    [Output('latest-price', 'children'),
     Output('latest-price', 'style')],
    Input('demo-interval', 'n_intervals'),
    State('latest-price', 'children')
)
def fake_price_generator(n_intervals, latest_price):
    fake_price = float(latest_price) + np.random.normal(0, 0.1)

    if fake_price > float(latest_price):
        return f'{fake_price:.2f}', {'color': 'red', 'background-color': 'rgba(195, 8, 26, 0.2)'}

    elif fake_price  float(latest_price):
        return f'{fake_price:.2f}', {'color': 'green', 'background-color': 'rgba(50, 115, 80, 0.2)'}

    return f'{fake_price:.2f}', {'background-color': 'rgba(113, 120, 117, 0.2)'}


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

import dash
import dash_daq as daq
import dash_html_components as html
import dash_bootstrap_components as dbc
from dash.dependencies import Input, Output

app = dash.Dash(__name__)

app.layout = dbc.Container(
    [
        daq.ColorPicker(
            id='color-picker',
            label={
                'label': '色彩選擇器',
                'style': {
                    'font-size': '18px',
                    'font-family': 'SimHei',
                    'font-weight': 'bold'
                }
            },
            size=400,
            value=dict(hex="#120E03")
        ),
        html.P(
            '測(cè)試'*100,
            id='demo-p',
            style={
                'margin-top': '20px'
            }
        )
    ],
    style={
        'margin-top': '30px',
        'max-width': '500px'
    }
)

app.clientside_callback(
    """
    function(color) {
        return {'color': color.hex, 'margin-top': '20px'};
    }
    """,
    Output('demo-p', 'style'),
    Input('color-picker', 'value')
)

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

import dash
import pandas as pd
import dash_datetimepicker
import dash_html_components as html
import dash_bootstrap_components as dbc
from dash.dependencies import Input, Output

app = dash.Dash(__name__)

app.layout = dbc.Container(
    [
        dash_datetimepicker.DashDatetimepicker(id="datetime-picker"),
        html.H6(id='datetime-output', style={'margin-top': '20px'})
    ],
    style={
        'margin-top': '100px',
        'max-width': '600px'
    }
)


@app.callback(
    Output('datetime-output', 'children'),
    [Input('datetime-picker', 'startDate'),
     Input('datetime-picker', 'endDate')]
)
def datetime_range(startDate, endDate):
    # 修正8小時(shí)時(shí)間差bug并格式化為字符串
    startDate = (pd.to_datetime(startDate) + pd.Timedelta(hours=8)).strftime('%Y-%m-%d %H:%M')
    endDate = (pd.to_datetime(endDate) + pd.Timedelta(hours=8)).strftime('%Y-%m-%d %H:%M')

    return f'從 {startDate} 到 {endDate}'


if __name__ == "__main__":
    app.run_server(debug=True)