Appion

This is needed for the Relion refine upload step.
starFile.py is heavily commented, so read that for details.

Basically, this is an object oriented set of classes that can be used to read an existing star file. Star files each have at least one data block which can have labels with or without values and a loop section with labels of it's own and value set entries that relate to the labels. These labels and loops can be extracted as dictionaries.
This file can also be used for writing new star files.