python多处理中的字符串参数

我试图在进程中将字符串参数传递给目标函数。不知何故,该字符串被解释为一个参数列表,其中包含的参数与字符的数量相同。

这是代码:

import multiprocessing

def write(s):
   print s

write('hello')

p = multiprocessing.Process(target=write, args=('hello'))

p.start()

我得到这个输出:

hello
Process Process-1:
Traceback (most recent call last):
>>>   File "/usr/local/lib/python2.5/site-packages/multiprocessing/process.py", line 237, in _bootstrap
    self.run()
  File "/usr/local/lib/python2.5/site-packages/multiprocessing/process.py", line 93, in run
    self._target(*self._args, **self._kwargs)
TypeError: write() takes exactly 1 argument (5 given)

>>>

我做错什么了?我该如何通过一条线?

谢谢,艾莉尔