Add reference to pyleco.

README.md

@@ -3,6 +3,7 @@
 [![Common Changelog](https://common-changelog.org/badge.svg)](https://common-changelog.org)
 
 LabView subVis to communicate with Python using [Laboratory Experiment COntrol (LECO) protocol](https://github.com/pymeasure/leco-protocol).
+The python counterpart is [PyLECO](https://github.com/pymeasure/pyleco).
 
 
 ## Contents