import sys
sys.path.append('../src')
import pcs
def main():
t = pcs.Field("type", 8)
l = pcs.Field("length", 8)
v = pcs.Field("value", 255, type = str)
tlv = pcs.Packet([t, l, v])
tlv.type = 5
tlv.length = 4
tlv.value = "foo"
print tlv.bytes