When writing up the results of research, how do we incorporate the results of scripts and calculations?
Manually typing results or copying & pasting of data is not reproducible. To have a reproducible research document, we need to automate the process of inserting results (code and data) into our documents (prose).
The IPython notebook is an integrated environment where you can write prose and execute sections of code.
Dexy is a project automation tool which runs code and inserts the results in a document. (It does a lot of other things too.)