bipy/pyqi — pull request #199 by josenavas (2013-10-11 17:44:55+00:00)
Title: Added new option: existing_dirpaths

A new option type is added: existing_dirpaths.
This option allows to the user to provide a comma-separated list of directories, and it checks its existence and that it is a directory.

I have a use case for that in the QIIME-Scaling project, and I'm sure that there are more use cases out there.