hooking the keyboard in multiple threads - pyhook and threading - multithreading

Question

Im trying to capture a set of words from the keyboard
and run a coresponding command to each word.
Each thread looks for a different word.
For some reason although both threads are running only one word is captured.
import pythoncom, pyHook, os, threading
KEYUP_EVENT_NAME = 'key up'
class keyboard_hooker(object):
"""
handles keyboard events and executes coresponding command.
""""
def __init__(self, target, command):
self.target = target
self.command = command
self.index = 0
def _target_function(self):
"""
the target function to execute when key sequence was pressed.
"""
os.system(self.command)
return
def _thread_opener(self):
"""
opens a thread to run the target function.
"""
new_thread = threading.Thread(target=self._target_function,args=())
new_thread.start()
return
def _keyboard(self, event):
"""
handles the keyboard event and searches for a specific word typed.
"""
print self.target
if event.MessageName == KEYUP_EVENT_NAME:
return True
if self.index == len(self.target) - 1:
self._thread_opener()
self.index = 0
return True
if chr(event.Ascii) == self.target[self.index]:
self.index += 1
return True
self.index = 0
return True
def hook_keyboard(self):
"""
hooks the keyboard presses.
blocking.
"""
hm = pyHook.HookManager()
hm.KeyAll = self._keyboard
hm.HookKeyboard()
pythoncom.PumpMessages()
this is the main file:
import shortcuts, threading, time
TARGETS = {'clcl': 'calc', 'fff': '"c:\Program Files\Google\Chrome\Application\chrome.exe" facebook.com'}
def keyboardHooker(key_word, target_command):
"""
initiats a new keyboard hooker instance.
"""
hooker = shortcuts.keyboard_hooker(key_word, target_command)
hooker.hook_keyboard()
def main():
for command in TARGETS:
new_thread = threading.Thread(target=keyboardHooker,args=(command, TARGETS[command]))
new_thread.start()
print "this is the active count {}".format(threading.active_count())
if __name__ == '__main__':
main()