在搜索了 plotly 和 dash 源代码以及示例之后。我能够想出一些简单的功能。这是一个开始,但它让我到达了我想去的地方。
import numpy as np
import dash
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Input, Output, Event
from textwrap import dedent as d
import json
import plotly.graph_objs as go
N = 1000
random_x = np.random.randn(N)
random_y = np.random.randn(N)
#Dash appliction boiler plate
app = dash.Dash()
app.css.config.serve_locally = True
app.scripts.config.serve_locally = True
styles = {
'pre': {
'border': 'thin lightgrey solid',
'overflowX': 'scroll'
}
}
# Edit your markup here
app.layout = html.Div([
html.H1('Wielding Data'),
dcc.Graph(id='basic-interactions'),
html.Div(className='row', children=[
html.Div([
dcc.Markdown(d("""
**Hover Data**
Mouse over values in the graph.
""")),
html.Pre(id='hover-data', style=styles['pre'])
], className='three columns'),
html.Div([
dcc.Markdown(d("""
**Click Data**
Click on points in the graph.
""")),
html.Pre(id='click-data', style=styles['pre']),
], className='three columns'),
html.Div([
dcc.Markdown(d("""
**Selection Data**
Choose the lasso or rectangle tool in the graph's menu
bar and then select points in the graph.
""")),
html.Pre(id='selected-data', style=styles['pre']),
], className='three columns'),
html.Div([
dcc.Markdown(d("""
**Zoom and Relayout Data**
Click and drag on the graph to zoom or click on the zoom
buttons in the graph's menu bar.
Clicking on legend items will also fire
this event.
""")),
html.Pre(id='relayout-data', style=styles['pre']),
], className='three columns')
])
])
@app.callback(
Output('basic-interactions','figure'),
[Input('basic-interactions','clickData')
])
def update_graph(clickData):
if not clickData:
x_value=[]
y_value=[]
else:
x_value = clickData['points'][0]['x']
y_value = clickData['points'][0]['y']
return{'data': [go.Scatter(
x=random_x,
y=random_y,
mode = 'markers'
)
],
'layout': {'hovermode': 'closest',
'annotations':[{
'x':x_value,
'y':y_value,
'arrowhead': 6,
'xref':'x',
'yref':'y',
'text':'X:' + str(x_value) + '\n' + 'Y:' + str(y_value),
'ax':0,
'ay':-20}]}}
@app.callback(
Output('hover-data', 'children'),
[Input('basic-interactions', 'hoverData')])
def display_hover_data(hoverData):
return json.dumps(hoverData, indent=2)
@app.callback(
Output('click-data', 'children'),
[Input('basic-interactions', 'clickData')])
def display_click_data(clickData):
print(clickData)
return json.dumps(clickData, indent=2)
@app.callback(
Output('selected-data', 'children'),
[Input('basic-interactions', 'selectedData')])
def display_selected_data(selectedData):
return json.dumps(selectedData, indent=2)
@app.callback(
Output('relayout-data', 'children'),
[Input('basic-interactions', 'relayoutData')])
def display_selected_data(relayoutData):
return json.dumps(relayoutData, indent=2)
if __name__ == '__main__':
app.run_server(debug=False)