>>> import albatross
>>> ctx = albatross.SimpleContext('.')
>>> class Node:
...     def __init__(self, ino):
...         self.ino = ino
...     def albatross_alias(self):
...         return 'ino%d' % self.ino
...
>>> ctx.locals.tree = Node(81489)
>>> albatross.Template(ctx, '<magic>', '''
... <al-tree expr="tree" iter="n">
... <al-input type="image" treeselect="n" src="/icons/face.gif" border="0" whitespace>
... </al-tree>
... ''').to_html(ctx)
>>> ctx.flush_content()
<input type="image" src="/icons/face.gif" border="0" name="treeselect,n,ino81489" />
