class HashTable:
    def __init__(self, capacity=10):
        if type(capacity) is not int:
            raise TypeError("Kapacita musí byť celé číslo (int)")
        if capacity <= 0:
            raise ValueError("Kapacita musí byť kladné číslo")
        self.__capacity = capacity
        self._size = 0

        self.empty = object()
        self.deleted = object()
        self.slots = [self.empty] * self.__capacity

    @property
    def capacity(self):
        return self.__capacity
    def _check_key(self, key):
        if not isinstance(key, str):
            raise TypeError("Kľúč musí byť reťazec (str)")