how to pass data to html page using flask?

You should pass the data to the homepage:

@app.route("/")
def home():
    return render_template('home.html', data=data)

Given that you're using Flask, I'll assume you use jinja2 templates. You can then do the following in your flask app:

return render_template('home.html', data=data)

And parse data in your HTML template:

<ul>
{% for item in data %}
    <li>{{item.name}}</li>
    <li>{{item.place}}</li>
    <li>{{item.mob}}</li>
{% endfor %}
</ul>

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