Pandas Dataframe display on a webpage

The following should work:

@app.route('/analysis/<filename>')
def analysis(filename):
    x = pd.DataFrame(np.random.randn(20, 5))
    return render_template("analysis.html", name=filename, data=x.to_html())
                                                                # ^^^^^^^^^

Check the documentation for additional options like CSS styling.

Additionally, you need to adjust your template like so:

{% extends "base.html" %}
{% block content %}
<h1>{{name}}</h1>
{{data | safe}}
{% endblock %}

in order to tell Jinja you’re passing in markup. Thanks to @SeanVieira for the tip.