print from thread are not properly displayed
Probably because of the trick used for multi session, the print called from a thread is not anymore working.
A work around is the following. The
current_greenlet = gevent.getcurrent()
output = current_greenlet.spawn_tree_locals.get("output")
class Check(threading.Thread):
def run(self):
print("check?", file=output)
t = Check()
t.start()