<commit_before>import abc
import sys

from .. import DPMachine

# Ensure compatibility with Python 2 and 3 when using ABCMeta
if sys.version_info >= (3, 4):
    ABC = abc.ABC
else:
    ABC = abc.ABCMeta(str('ABC'), (), {})


class DPMechanism(DPMachine, ABC):
    def __init__(self):
        self.epsilon = None
        self.delta = None

    def __repr__(self):
        output = str(self.__module__) + "." + str(self.__class__.__name__) + "()"
        output += ".setEpsilon(" + str(self.epsilon) + ")" if self.epsilon is not None else ""

        return output

    @abc.abstractmethod
    def randomise(self, value):
        pass

    def get_bias(self, value):
        """

        :param value:
        :return:
        :rtype: Union[None, float]
        """
        return None

    def get_variance(self, value):
        return None

    def get_mse(self, value):
        if self.get_variance(value) is None or self.get_bias(value) is None:
            return None

        return self.get_variance(value) + (self.get_bias(value)) ** 2

    def set_epsilon(self, epsilon):
        if self.epsilon is not None:
            raise ValueError("Epsilon cannot be reset; initiate a new mechanism instance instead.")

        if epsilon < 0:
            raise ValueError("Epsilon must be non-negative")

        self.epsilon = epsilon
        return self

    def set_epsilon_delta(self, epsilon, delta):
        if epsilon < 0:
            raise ValueError("Epsilon must be non-negative")

        if not (0 <= delta <= 1):
            raise ValueError("Delta must be in [0, 1]")

        if epsilon + delta == 0:
            raise ValueError("Epsilon and Delta cannot both be zero")

        self.epsilon = epsilon
        self.delta = delta

        return self

    def check_inputs(self, value):
        """

        :param value:
        :return:
        :rtype: `bool`<commit_msg>Making set_epsilon_delta main function for setting epsilon<commit_after>import abc
import sys

from .. import DPMachine

# Ensure compatibility with Python 2 and 3 when using ABCMeta
if sys.version_info >= (3, 4):
    ABC = abc.ABC
else:
    ABC = abc.ABCMeta(str('ABC'), (), {})


class DPMechanism(DPMachine, ABC):
    def __init__(self):
        self.epsilon = None
        self.delta = None

    def __repr__(self):
        output = str(self.__module__) + "." + str(self.__class__.__name__) + "()"
        output += ".setEpsilon(" + str(self.epsilon) + ")" if self.epsilon is not None else ""

        return output

    @abc.abstractmethod
    def randomise(self, value):
        pass

    def get_bias(self, value):
        """

        :param value:
        :return:
        :rtype: Union[None, float]
        """
        return None

    def get_variance(self, value):
        return None

    def get_mse(self, value):
        if self.get_variance(value) is None or self.get_bias(value) is None:
            return None

        return self.get_variance(value) + (self.get_bias(value)) ** 2

    def set_epsilon(self, epsilon):
        if epsilon <= 0:
            raise ValueError("Epsilon must be strictly positive")

        return self.set_epsilon_delta(epsilon, 0.0)

    def set_epsilon_delta(self, epsilon, delta):
        if epsilon < 0:
            raise ValueError("Epsilon must be non-negative")

        if not (0 <= delta <= 1):
            raise ValueError("Delta must be in [0, 1]")

        if epsilon + delta == 0:
            raise ValueError("Epsilon and Delta cannot both be zero")

        self.epsilon = epsilon
        self.delta = delta

        return self

    def check_inputs(self, value):
        """

        :param value:
        :return:
        :rtype: `bool`
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{'dir': 'git-commits-cleaned', 'id': '4204446', 'n_tokens_mistral': 1128, 'n_tokens_neox': 1076, 'n_words': 332}