How to trigger a function by clicking the left mouse click?

[HelloBoyz]

I want to start off by saying that I am new to Python so I am sorry if this question is going to sound stupid to you.

I am just looking for an easy way to trigger a function whenever I press the left click of my mouse. Could anyone illustrate me how to achieve this? Examples are greatly appreciated.

My code now:

import win32api
import win32con
import time
from random import randint
#import pygame

#pygame.init()

def mouseClick():
   win32api.mouse_event(win32con.MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0)
   time.sleep(0.005)
   win32api.mouse_event(win32con.MOUSEEVENTF_LEFTUP, 0, 0, 0, 0)


while True :
   if win32api.mouse_event(win32con.MOUSEEVENTF_LEFTDOWN,0,0,0,0):
       time.sleep(0.03)
       mouseClick()
       time.sleep(0.3)

That's what I've done so far, but that doesn't work as python starts clicking thousands times per second.