problem with user confirmation

[Matthew]

I am have written a medium sized program and everything works fine
except for one piece. At a certain point in the program I want to do a
simple user confirmation, eg Are you sure ? y/n. The problem that I am
having is that after the user enters an answer and presses enter, the
program executes the rest of the code regardless of what the user
response was.

Heres my code:

def confirmAction(self, msg):
		if not msg:
			msg = 'Are you sure y/[n]> '
		print msg
		confirm = sys.stdin.readline()[:-1]
		print 'confirm = \'%s\'' %(confirm)
		if confirm == 'y' or 'Y' or 'Yes' or 'YES' or 'yes':
			return 1
		return 0

if confirmAction('Are you sure you want to DEACTIVATE this port?
y/[n]'):
				print 'Deactivating
				#Do some other stuff
			else:
				sys.exit(-1)

At this point in the program I can enter nothing, or y, or sdfasd, and
no matter what I do it prints 'Deactivating and executes the rest of
my code. I can't figure it out to save my life. I am sure that the
answer is very simple and that I have just been thinking to hard and
have over looked it.

Thanks for any help
-matthew