import sys sys.path.append(sys.argv[1]) # import compiled python module depending on version of python we are running with if sys.version_info[0] == 2: import python2_module if sys.version_info[0] == 3: import python3_module def run(): msg = 'howdy' if sys.version_info[0] == 2: w = python2_module.World() if sys.version_info[0] == 3: w = python3_module.World() w.set(msg) assert(msg == w.greet()) version_string = str(sys.version_info[0]) + "." + str(sys.version_info[1]) assert(version_string == w.version()) if __name__ == '__main__': run()