# determine the number of bits in character count indicator

length = utils.getcountbits(version, mode)

if mode == NUMERIC:

groups = [data[i:i 3] for i in range(0, len(data), 3)]

last = groups[-1]

groups = [('0' * (10 - len(bin(int(group))[2:])) \

bin(int(group))[2:]) for group in groups[:-1]]

if len(last) == 3:

last = '0' * (10 - len(bin(int(last))[2:])) bin(int(last))[2:]

elif len(last) == 2:

last = '0' * (7 - len(bin(int(last))[2:])) bin(int(last))[2:]

else:

last = '0' * (4 - len(bin(int(last))[2:])) bin(int(last))[2:]

groups.append(last)

elif mode == ALPHANUMERIC:

values = [alphanumeric.index(aln) for aln in data]

groups = [values[i:i 2] for i in range(0, len(values), 2)]

last = groups[-1]

groups = [(group[0] * 45 group[1]) for group in groups[:-1]]

groups = ['0' * (11 - len(bin(group)[2:])) bin(group)[2:] \

for group in groups]

if len(last) == 2:

last = last[0] * 45 last[1]

llen = 11

else:

last = last[0]

llen = 6

last = '0' * (llen - len(bin(last)[2:])) bin(last)[2:]

groups.append(last)

elif mode == EIGHTBITBYTE:

values = [(eightbitbyte.index(ebb) 33) for ebb in data]

groups = [('0' * (8 - len(bin(value)[2:])) bin(value)[2:]) \

for value in values]

bitstream = utils.getbitstream(data, length, mode, groups)

bitstream = (8 - (len(bitstream) % 8)) * '0'

codewords = [bitstream[i:i 8] for i in range(0, len(bitstream), 8)]

# capability defined in data

capability = diceccw[str(version) '-' ecl][0]

padding = capability - len(codewords)

if padding % 2 == 0:

codewords.extend(pcws * (padding / 2))

else:

codewords.extend(pcws * int(padding / 2))

codewords.append(pcws[0])