Question

using code from this site: http://www.saltycrane.com/blog/2008/09/simplistic-python-thread-example/

The code is

import time
from threading import Thread

def myfunc(i):
    print "sleeping 5 sec from thread %d" % i
    time.sleep(5)
    print "finished sleeping from thread %d" % i

for i in range(10):
    t = Thread(target=myfunc, args=(i,))
    t.start()

and I get this output:

sleeping 5 sec from thread 0
sleeping 5 sec from thread 1
sleeping 5 sec from thread 2
sleeping 5 sec from thread 3
sleeping 5 sec from thread 4
sleeping 5 sec from thread 5
sleeping 5 sec from thread 6
sleeping 5 sec from thread 7
sleeping 5 sec from thread 8
sleeping 5 sec from thread 9
finished sleeping from thread 0
finished sleeping from thread 2
finished sleeping from thread 4
finished sleeping from thread 1finished sleeping from thread 6finished sleeping from   thread 8
finished sleeping from thread 5finished sleeping from thread 7finished sleeping from thread 9

finished sleeping from thread 3

what going on here? I am ok with the threads not printing in order because this is possible, but why are they not printing on newlines at the end? I am using python 2.6 under windows xp

Answer 1

I think they when a thread didn’t print a new line it’s because the control was passed to another thread before the first thread printed the new line.