String arguments in Python multiprocessing

Question

I'm trying to pass a string argument to a target function in a process. Somehow, the string is interpreted as a list of as many arguments as there are characters.

This is the code:

import multiprocessing

def write(s):
   print s

write('hello')

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

p.start()

I get this output:

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)

>>>

What am I doing wrong? How am I supposed to pass a string?

String arguments in Python multiprocessing

3 Answers