Pydna is a python package that provides a human-readable formal descriptions of cloning and genetic assembly strategies in Python for simulation and verification. Pydna can be used as executable documentation for cloning.

Designing genetic constructs with many components and steps, like recombinant metabolic pathways, often makes accurate documentation difficult, as seen in the poor state of scientific literature.

A cloning strategy expressed in pydna is complete, unambiguous and stable.