def button1(): #où 'Mouse' est un sensor over_any
if cont.sensors['Mouse'].hitObject == obl['back_2']:
if logic.mouse.events[events.LEFTMOUSE] == logic.KX_INPUT_JUST_ACTIVATED:
print('Walk')
else:
pass
Cette contribution était de : http://blenderclan.tuxfamily.org/html/newbb/viewtopic.php?forum=2&topic_id=47497&post_id=566846