fork?

        import thread
        import os
        import sys
        import time

	def proz():
		if os.access('transport', os.F_OK):
			os.system('rm -rf transport')
		os.mkfifo('transport')
		channel = open('transport','w',1)
		for i in range(100):
			channel.flush()
			channel.write('data %i\n' %i)
			time.sleep(.1)
		channel.close()
		
	def test():
		thread.start_new_thread(self.proz,())
		time.sleep(.1)
		while not os.access('transport',os.R_OK):
			pass
		channel = open('transport','rw',1)
		while 1:
			line = channel.readline()
			if not line:
				break
		        print line
		channel.close()
		os.unlink('transport')

a v fork?

Не fork а popen* - там их много.