'Test if this address is allocated for private networks.
Returns:
A boolean, True if the address is reserved per RFC 4193.'

@property
def is_private(self):

    private_network = IPv6Network('fc00::/7')
    if isinstance(self, _BaseAddress):
        return (self in private_network)
    return ((self.network_address in private_network) and (self.broadcast_address in private_network))
