class Counter(object):
    def __init__(self, fvalue=0, inc = lambda x: x + 1):
        self.inc = inc
        self.val = fvalue
    def __call__(self):
        old = self.val
        self.val = self.inc(self.val)
        return old
        
        
c = Counter(1)
print [ c() for i in xrange(0, 10)]