As a nuclear physicist you sometimes desire quick and easy access to a large amount of nuclear data. You find yourself searching the web for complete data sets of the specific property your interested in. If you find a data set, it might not be as complete as you wanted and above all it requires some proper file parsing to read in the data.
With PyNE your problems are solved. It is called a Nuclear Engineering Toolkit and provides a Python API where e.g. nuclear decay data based on ENSDF can be obtained.