Is it possible to make it appear to a system that a key was pressed, for example I need to  make A key be pressed thousands of times, and it is much to time consuming to do it manually, I would like to write something to do it for me, and the only thing I know well enough is Python.
A better way to put it, I need to emulate a key press, I.E. not capture a key press.
More Info (as requested):
I am running windows XP and need to send the keys to another application.
You can use pyautogui module which can be used for automatically moving the mouse and for pressing a key. It can also be used for some GUI(very basic).
You can do the following :-
import pyautogui
pyautogui.press('A') # presses the 'A' key
If you want to do it 1000 times, then you can use a while loop
Hope this is helpful :)
Key Presses in Python