{% block headercontainer %}
{% endblock %}
{% block header_buttons %}
{% block login_widget %}
{% if logged_in %}
{% elif login_available and not logged_in %}
{% endif %}
{% endblock %}
{% endblock header_buttons %}
{% block header %}
{% endblock %}
![Jupyter Notebook]({{static_url("base/images/logo.png") }}){kind=logo}
{% endblock %}