Dumbo is a project that allows you to easily write and run Hadoop programs in Python (it’s named after Disney’s flying circus elephant, since the logo of Hadoop is an elephant and Python was named after the BBC series “Monty Python’s Flying Circus”). More generally, Dumbo can be considered to be a convenient Python API for writing MapReduce programs.
Inspired by Yahoo's Pipes, DERI Web Data Pipes implement a generalization which can also deal with formats such as RDF (RDFa), Microformats and generic XML.