class Tetel(object):
    def __init__(self, file):
        self.file = file
        self.numbers = []

        with open(self.file) as f:
            for n in f:
		try:
                	self.numbers.append(int(n))
		except:
			pass
    def szamlal(self, func):
        return len([x for x in self.numbers if func(x)])

    def osszegez(self):
        return sum(self.numbers)

    def maxker(self):
        return max(self.numbers)

    def feltmaxker(self, func):
        return max([x for x in self.numbers if func(x)])