Python使用Flask在界面展示Plotly图表
顾磊
来自：
https://towardsdatascience.com/web-visualization-with-plotly-and-flask-3660abf9c946
from flask import Flask, render_template
import pandas as pd
import json
import plotly
import plotly.express as px
app = Flask(__name__)
@app.route('/')
def notdash():
df = pd.DataFrame({
'Fruit': ['Apples', 'Oranges', 'Bananas', 'Apples', 'Oranges',
'Bananas'],
'Amount': [4, 1, 2, 2, 4, 5],
'City': ['SF', 'SF', 'SF', 'Montreal', 'Montreal', 'Montreal']
})
fig = px.bar(df, x='Fruit', y='Amount', color='City',
barmode='group')
graphJSON = json.dumps(fig, cls=plotly.utils.PlotlyJSONEncoder)
return render_template('notdash.html', graphJSON=graphJSON)
<!doctype html>
<html>
<body>
<h1>Hello Plotly (but not Dash)</h1>
<div id='chart' class='chart'”></div>
</body>
<script src='https://cdn.plot.ly/plotly-latest.min.js'></script>
<script type='text/javascript'>
var graphs = {{graphJSON | safe}};
Plotly.plot('chart',graphs,{});
</script>
</html>
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