hi i use this programme in my application django:
import structMASK_CCITT = 0x1021 # CRC-CCITT mask (ISO 3309, used in X25,
HDLC)MASK_CRC16 = 0xA001 # CRC16 mask (used in ARC files)def updcrc(crc,
data, mask=MASK_CRC16): data_length = len(data) unpackFormat = '%db' %
data_length unpackedData = struct.unpack(unpackFormat, data) for char
in data: c = ord(char) c = c << 8 for j in
xrange(8): if (crc ^ c) & 0x8000: crc = (crc
<< 1) ^ mask else: crc = crc << 1
c = c << 1 return crc & 0xffff
and i call this function in other function in my view:
def encodekey(var, expires=None, user='', trusted=False): import
random, base64 import updcrc key = "%02X" % len(var) + var
key += "%02X" % len(user) + user if expires is not None: key
+= expires.strftime('%Y%m%d%H%M') else: year =
random.choice(range(2000,2100)) month = 23 day =
random.choice(range(1,32)) hour = random.choice(range(1,25))
minute = random.choice(range(1,60)) key += "%04d%02d%02d%02d%02d"
% (year, month, day, hour, minute) if trusted: checksum =
updcrc(42, key) else: checksum = updcrc(0, key)
key += "%04X" % checksum return base64.b64encode(key)
but it give me this error:
unpack requires a string argument of length 31
someone can help me
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