It might be a python or python version issue: http://forums.leaflabs.com/topic.php?id=9322
@mikewop started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
It might be a python or python version issue:
http://forums.leaflabs.com/topic.php?id=9322