Python-сообщество

import threading
import time
arr = ["Item1", "Item2", "Item3",
        "Item4", "Item5", "Item6", "Item7"]
def iter(thread):
      while len(arr) > 0:
            time.sleep(0.01)
            print "thread [%d] - %s" % (thread, arr.pop(0))
            
class MyThread(threading.Thread):
      def __init__(self):
            super(MyThread, self).__init__()
            self.threadID = None
      def run(self):
            threading.Lock().acquire()
            iter(self.threadID)
            threading.Lock().release()
for x in range(3):
      t = MyThread()
      t.threadID = x
      t.start()

Exception in thread Thread-2:
Traceback (most recent call last):
  File "C:\Python25\lib\threading.py", line 462, in __bootstrap
    self.run()
  File "c:\Python-Coding\classTest1\threads.py", line 18, in run
    iter(self.threadID)
  File "c:\Python-Coding\classTest1\threads.py", line 10, in iter
    print "thread [%d] - %s" % (thread, arr.pop(0))
IndexError: pop from empty list
Exception in thread Thread-3:
Traceback (most recent call last):
  File "C:\Python25\lib\threading.py", line 462, in __bootstrap
    self.run()
  File "c:\Python-Coding\classTest1\threads.py", line 18, in run
    iter(self.threadID)
  File "c:\Python-Coding\classTest1\threads.py", line 10, in iter
    print "thread [%d] - %s" % (thread, arr.pop(0))
IndexError: pop from empty list
Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Python25\lib\threading.py", line 462, in __bootstrap
    self.run()
  File "c:\Python-Coding\classTest1\threads.py", line 19, in run
    threading.Lock().release()
error: release unlocked lock

threading.Lock().acquire()
threading.Lock().release()

l = threading.Lock()
.....
l.acquire()
.....
.release()