try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
try:
from struct import Struct
except ImportError:
from struct import pack,unpack,calcsize
class Packer(object):
__slots__ = ["format", "size"]
def __init__(self, format):
self.format = format
self.size = calcsize(format)
def pack(self, *args):
return pack(self.format, *args)
def unpack(self, data):
return unpack(self.format, data)
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