inheritance example and doc

templates/python-armor.tpl

@@ -0,0 +1,10
+{%- extends 'python.tpl' -%}
+
+{% block codecell %}
+==============================
+=======start codecell=========
+{{ super() }}
+======= end codecell =========
+==============================
+{% endblock codecell %}
+

templates/null.tpl

@@ -1,37 +1,57
 {%- extends 'basic.tpl' -%}
 
+{#
+
+Null template, Does nothing except defining a basic structure
+To layout the diferents blocks of a notebook.
+
+Subtemplates can Override Blocks to define their custom reresentation.
+
+If one of the block you do overrite is nt a leave block, consider
+calling super.
+
+{% block nonLeaveBlock %}
+    #add stuff at beginning
+    {{ super() }}
+    #add stuff at end
+{% endblock nonLeaveBlock %}
+
+consider calling super even if block is leave block, we might insert more block later.
+
+#}
+
 {% block codecell scoped  %}
 {% block in_prompt %}{% endblock in_prompt %}
 {% block input %}{% endblock input %}
 {% if cell.outputs %}
 {% block output_prompt %}{% endblock output_prompt %}
 {%- for output in cell.outputs -%}
     {%- if output.output_type in ['pyout']%}
         {% block pyout scoped %}{% endblock pyout %}
     {%- elif output.output_type in ['stream'] %}
        {% block stream scoped %}{% endblock stream %}
     {%- elif output.output_type in ['display_data'] %}
         {% block display_data scoped %}{% endblock display_data %}
     {%- elif output.output_type in ['pyerr'] %}
         {% block pyerr scoped %}
         {%- for line in output.traceback %}
             {% block traceback_line scoped %}{% endblock traceback_line %}
         {%- endfor %}
         {% endblock pyerr %}
     {%- endif %}
 {%- endfor -%}
 {% endif %}
 
 {% endblock codecell %}
 
 {% block markdowncell scoped %}
 {% endblock markdowncell %}
 
 {% block headingcell scoped %}
 {% endblock headingcell %}
 
 {% block rawcell scoped %}
 {% endblock rawcell %}
 
 {% block unknowncell scoped %}
 {% endblock unknowncell %}