Avoiding Python to be terminated by Red Key and Hiding the shell:

#Copyright (c) 2008 Pankaj Nathani

#imports the Envy module
import envy

#prints Envy version
print envy.version

print envy.is_app_system()

try:
    envy.set_app_system(1)
except:
    print 'exception !'

# Now python can't be terminated with the red key
print envy.is_app_system()
print 'now python can't be terminated by red key !'