线程间变量独享

[root@yyjk ~/sbin/F5]#cat test4.py 
import threading
import time
threads = []
def fun9():
  x=100
  time.sleep(1)
  x= x+1;
  print x
  return x
  
  

def fun10():
  time.sleep(18)
  x=x+4
  print x
  return x;
  
t9 = threading.Thread(target=fun9,name='fun9')
threads.append(t9)
t10 = threading.Thread(target=fun10,name='fun10')
threads.append(t10)


for t in threads:
   t.setDaemon(True)
   t.start()
for t in threads:
  t.join()

[root@yyjk ~/sbin/F5]#time python test4.py
101
Exception in thread fun10:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/threading.py", line 551, in __bootstrap_inner
    self.run()
  File "/usr/local/lib/python2.7/threading.py", line 504, in run
    self.__target(*self.__args, **self.__kwargs)
  File "test4.py", line 15, in fun10
    x=x+4
UnboundLocalError: local variable 'x' referenced before assignment


real 0m18.039s
user 0m0.017s
sys 0m0.005s