(data, size=None)
return entropy
Calculate the entropy of a piece of data

        :param data: The target data to calculate entropy on
        :param size: Size of the data, Optional.
        :return: A float
Calculate the entropy of a piece of data
Calculate the entropy of a piece of data
def _calc_entropy(data, size=None):
        """
        Calculate the entropy of a piece of data

        :param data: The target data to calculate entropy on
        :param size: Size of the data, Optional.
        :return: A float
        """

        if not data:
            return 0
        entropy = 0
        if size is None:
            size = len(data)

        data = bytes(pyvex.ffi.buffer(data, size))
        for x in range(0, 256):
            p_x = float(data.count(x)) / size
            if p_x > 0:
                entropy += - p_x * math.log(p_x, 2)
        return entropy
def _calc_entropy ( data , size = None ) : if not data : return 0 entropy = 0 if size is None : size = len ( data ) data = bytes ( pyvex . ffi . buffer ( data , size ) ) for x in range ( 0 , 256 ) : p_x = float ( data . count ( x ) ) / size if p_x > 0 : entropy += - p_x * math . log ( p_x , 2 ) return entropy