VisTrails shell running Python 2.7.1 (r271:86882M, Nov 30 2010, 09:39:13) 
[GCC 4.0.1 (Apple Inc. build 5494)] on darwin.
Type "copyright", "credits" or "license" for more information on Python.
>>> [ec:1.1.1.3, ec:2.7.2.4]
[ec:2.2.1.6]
[ec:6.3.5.5]
[[path:map00260, path:map00270, path:map00300, path:map01100, path:map01110, path:map01120], [path:map00290, path:map00650, path:map00660, path:map00770, path:map01100, path:map01110], [path:map00240, path:map00250, path:map01100]]