import threading
import sys
print sys.executable

class F(threading.Thread):
    
    def __init__(self):
        threading.Thread.__init__(self)
        self.setDaemon(True)

lst = [0] 
def func(frame, *args, **kwargs):
#    print frameVarsToXML(frame)
    lst[0] += 1
    if lst[0] < 30: #start up to 30 threads (actually, this happens even with less threads)
        F().start()
    return func
    
sys.settrace(func)

from posix import *
dir = unicode('/home/fabioz/jython')
print listdir(dir)