class Myint(object):
    def set_val(self , val):
        try:
            val = int(val)
        except ValueError:
            return
        self.val = val

    def get_val(self):
        return  self.val

    def increment_val(self):
        self.val = self.val + 1

malaka = Myint()
malaka.set_val(9)
print(malaka.get_val())
malaka.set_val('hi')
print(malaka.get_val())