def crispy_addon(field, append="", prepend="", form_show_labels=True):
    """
    Renders a form field using bootstrap's prepended or appended text::

        {% crispy_addon form.my_field prepend="$" append=".00" %}

    You can also just prepend or append like so

        {% crispy_addon form.my_field prepend="$" %}
        {% crispy_addon form.my_field append=".00" %}
    """
    if field:
        context = Context({
            'field': field,
            'form_show_errors': True,
            'form_show_labels': form_show_labels,
        })
        template = loader.get_template('%s/layout/prepended_appended_text.html' % get_template_pack())
        context['crispy_prepended_text'] = prepend
        context['crispy_appended_text'] = append

        if not prepend and not append:
            raise TypeError("Expected a prepend and/or append argument")

        context = context.flatten()

    return template.render(context)
Renders a form field using bootstrap's prepended or appended text::

        {% crispy_addon form.my_field prepend="$" append=".00" %}

    You can also just prepend or append like so

        {% crispy_addon form.my_field prepend="$" %}
        {% crispy_addon form.my_field append=".00" %}