Table 1.

Overview of the PaPy package

Package	Purpose
papy	Provides the core objects and methods for workflow construction and deployment, including the Worker, Piper, Dagger, and Plumber classes (see Table 2).
numap	Supplies an extension of Python's 'imap' facility, enabling parallel/distributed execution of tasks, locally or remotely (see Fig. 1B).
nubio	Provides data-structures and methods specific to bioinformatic data (molecular sequences, alignments, phylogenetic trees, 3 D structures)

PaPy is comprised of three packages, independently providing the set of functionalities described in this table.