PMDA is a Python library that provides parallel analysis algorithms based on MDAnalysis. With a simple map-reduce scheme from Dask library, PMDA provides pre-defined analysis tasks and a common interface to create user-defined analysis taks. Although still in alpha stage, it is already used on resources ranging from multi-core laptops to XSEDE supercomputers to speed up analysis of molecular dynamics trajectories. Shujie Fan, Max Linke, Ioannis Paraskevakos, Richard Gowers, Michael Gecht and Oliver Beckstein