This paper deals with the time-domain simulation of electric machine drives in Python. Python offers a full-featured numerical computing environment, comparable to leading commercially available alternatives, whilst being fully open-source. Adopting the open-source ecosystem allows electric drives researchers to utilize new methods from other fields, easily share their findings, and improve collaboration with other researchers both in academia and industry. For this purpose, we have launched the Python-based time-domain simulation platform motulator for electric drives. To learn more, the reader is encouraged to visit the GitHub page of the project: https: //github.com/Aalto-Electric-Drives/motulator.