Converts this field to binary (assuming it's a binary string)

def binary_value(self):
        """
        Converts this field to binary (assuming it's a binary string)
        """
        str_raw_value = str(self.raw_value)
        if len(str_raw_value) % 2 == 1:
            str_raw_value = '0' + str_raw_value

        return binascii.unhexlify(str_raw_value)