Python parallelization error

Code

from multiprocessing import Pool
from scipy.stats import uniform

def unwrap_self_f(arg, **kwarg):
    return C.f(*arg, **kwarg)

class C:
    def __init__(self, x = []):
        self.x = x
    
    def f(self, name):
        print 'hello %s' %name
    
    def run(self):
        pool = Pool(processes=4)
        names = ('frank', 'justin', 'osi', 'thomas')
        pool.map(unwrap_self_f, zip([self]*len(names), names))

if __name__ == '__main__':
    print "Parallelize when I only contain an integer"
    
    c = C(x = 1)
    c.run()
    
    print "Parallelize when I contain something more complicated"
    
    c = C(x = uniform)
    c.run()

Error from second part

Exception in thread Thread-2:
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 530, in __bootstrap_inner
    self.run()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 483, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/pool.py", line 285, in _handle_tasks
    put(task)
PicklingError: Can't pickle <type 'function'>: attribute lookup __builtin__.function failed