def __init__(self, filename=None):
from pskc.encryption import Encryption
from pskc.mac import MAC
self.version = None
self.id = None
self.encryption = Encryption(self)
self.mac = MAC(self)
self.devices = []
if filename is not None:
from pskc.parser import PSKCParser
PSKCParser.parse_file(self, filename)
else:
self.version = '1.0'
