Python modules for Xplor-NIH For detailed help on a specific module, call the module's help() method. simulation - object which contains atom properties and structure information. ivm - Internal Variable Module for dynamics and minimization. vmdInter - Interface for communication with the external VMD program. atomSel - atom selection object atomSelCallback - perform actions on atomSels- writable in python. tclInterp - execute TCL commands. atomProb - generate reweighted atom probability maps. noePot - distance restraint potential term. pot - necessary interface for writing potential energy terms in python. The following are low-level interfaces which are generally not directly called by a user. vec3 - 3-vector representing a point in Cartesian ccoordinates. cdsVector - a Vector container - used for linear algebra. cdsList.i - a List container - a more generic containr. atom - an atom object xplorWrap - low-level interface to xplor functionality.