Run Application from host

import os
os.execl( "c:/Windows/Notepad.exe", "c:/userlog.txt")
print "Running notepad"


#or

import subprocess
subprocess.call("c:/Windows/Notepad.exe")
print "Running notepad"



#starting a Web browser:

import os
os.system('/usr/bin/firefox')
os.system(r'c:\"Program Files"\"Mozilla Firefox"\firefox.exe')


#Windows specific function os.startfile:

import os
os.startfile(r' c:\Program Files\Mozilla Firefox\firefox.exe')