pDynamo3 is the first formal version of the Dynamo molecular modeling and simulation library that is written in Python 3. It follows from the previous pDynamo versions written in Python 2, the first of which was released in 2007. Both pDynamo and its predecessor, fDynamo, were designed with the aim of providing easy-to-use and flexible frameworks for performing molecular simulations at an atomistic level with a special emphasis on those employing hybrid quantum chemical and molecular mechanical potential methods. Although the use of pDynamo3 is quite similar to that of pDynamo2, it has added significant new capability and also undergone extensive restructuring that will make it much easier to extend with new functionality. The pDynamo3 code is issued under the GNU general public license at https://github.com/pdynamo/pDynamo3 with additional information on the pDynamo website https:www.pdynamo.org.
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