This is very clearly explained in the Flask documentation so I recommend that you read it for a full understanding, but here is a very simple example of rendering template variables.
HTML template file stored in templates/index.html:
<html>
<body>
<p>Here is my variable: {{ variable }}</p>
</body>
</html>
And the simple Flask app:
from flask import Flask, render_template
app = Flask('testapp')
@app.route('/')
def index():
return render_template('index.html', variable='12345')
if __name__ == '__main__':
app.run()
Run this script and visit http://127.0.0.1:5000/ in your browser. You should see the value of variable rendered as 12345
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