<form action="{{ request.url.path }}" method="post">
    <div class="form-group">
        <label for="dataFormat">Data Format</label>
        <select class="form-control" id="dataFormat">
            {% for opt in data_format_options %}
                <option value="{{ opt.value }}">{{ opt.name }}</option>
            {% endfor %}
        </select>
        <input type="submit" value="Submit"
               class="btn btn-primary btn-rounded">
    </div>
</form>