Screwing with subprocess

gistfile1.py

from signal import *
from subprocess import *

Popen(['true']).communicate()

signal(SIGCHLD, SIG_IGN)

Popen(['true']).communicate()

gistfile2.txt

Traceback (most recent call last):
  File "test.py", line 8, in <module>
    Popen(['true']).communicate()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py", line 668, in communicate
    self.wait()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py", line 1137, in wait
    pid, sts = os.waitpid(self.pid, 0)
OSError: [Errno 10] No child processes