Pyramid framework tips : Flash messages

In Pyramid Applications you can set Flash messages in sessions. To use flash messaging, you must enable a session factory. For pyramid_beaker add-on: Pyramid framework tips : Beaker session factory settings
In your controller code after save, update or delete:

  dbsession.add(category)
  # warning; is for css class
  request.session.flash("warning;New Category is saved!")

In mako templates:

		${self.flash_messages()}
   		${next.body()}


## flash messages with css class und fade in options
<%def name="flash_messages()">
	% if request.session.peek_flash():
		<% flash = request.session.pop_flash() %>
		% for message in flash:

		   ×
		 ${message.split(";")[1]}

% endfor
	% endif
<%def>

I am using Bootstrap from Twitter for css and javascripts with jQuery