strange append

[E.Nurminski]

Hello to all good people

I am new to the great Py so am quite puzzled by the following code

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res = []
x = [ 1, 1 ]
for i in xrange(0,5):
	res.append(x)
	x[1] = x[1] + 1
	print "x = ", x
	print "res = ", res

---------------

Looks like it puts smth like reference to 'x' into 'res' list, instead of 
value. But if I want a value should I use a different method or what ?

Evgeni

P.S. Could not easily find the issue in the manual/tutorial can you point 
me out to smth relevant ?