python zfec usage

zfec_test.py

from zfec.easyfec import Encoder, Decoder
import random

# 5 correction blocks for every 20 blocks
enc = Encoder(20, 25)
dec = Decoder(20, 25)

# Dummy payload
data = ' '.join(str(x) for x in range(100))

stream = enc.encode(data)

# Attach block numbers and pick a random 20
packets = random.sample(enumerate(stream), 20)

for i, d in packets:
    print i, d

# now pass in the blocks + blocknums
blocks = list(x[1] for x in packets)
blocknums = list(x[0] for x in packets)
decoded = dec.decode(blocks, sharenums=blocknums, padlen=0)

print decoded