{% macro choices(name, choices_list, checked=none) %}
    {% for choice in choices_list %}
        <label><input type="radio" name="{{name}}" value="{{choice}}"{{"checked" if checked==choice}}>{{choice}}</label>
    {% endfor %}
{% endmacro %}

{% macro int(name, label="", init=0) %}
    <label><input type="number" name="{{name}}" value="{{init}}" step="1" min="0">{{label}}</label>
{% endmacro %}

{% macro meta(name, value) %}
    <input type="hidden" name="{{name}}" value="{{value}}">
{% endmacro %}

{% macro submit() %}
    <input type="submit" value="Send">
{% endmacro %}