thank you i did find solution i did have just change:
unpackedData = struct.unpack(unpackFormat, data) to
unpackedData = struct.unpack(unpackFormat, data.decode('string_escape'))
From: [EMAIL PROTECTED]
Subject: Python-list Digest, Vol 55, Issue 179
To: python-list@python.org
Date: Fri, 11 Apr 2008 15:50:04 +0200
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From: [EMAIL PROTECTED]
To: python-list@python.org
Date: Fri, 11 Apr 2008 05:58:46 -0700
Subject: Re: Rounding a number to nearest even
On Apr 11, 2:14 pm, bdsatish <[EMAIL PROTECTED]> wrote:
> The built-in function round( ) will always "round up", that is 1.5 is
> rounded to 2.0 and 2.5 is rounded to 3.0.
>
> If I want to round to the nearest even, that is
>
> my_round(1.5) = 2# As expected
> my_round(2.5) = 2# Not 3, which is an odd num
>
> I'm interested in rounding numbers of the form "x.5" depending upon
> whether x is odd or even. Any idea about how to implement it ?
def even_round(x):
if x % 1 == .5 and not (int(x) % 2):
return float(int(x))
else:
return round(x)
nums = [ 3.2, 3.6, 3.5, 2.5, -.5, -1.5, -1.3, -1.8, -2.5 ]
for num in nums:
print num, '->', even_round(num)
3.2 -> 3.0
3.6 -> 4.0
3.5 -> 4.0
2.5 -> 2.0
-0.5 -> 0.0
-1.5 -> -2.0
-1.3 -> -1.0
-1.8 -> -2.0
-2.5 -> -2.0
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From: [EMAIL PROTECTED]
To: python-list@python.org
Date: Fri, 11 Apr 2008 09:07:42 -0400
Subject: Re: (unknown)
ha bo wrote:
> hi i use this programme in my application django:
> import struct
> MASK_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 & 0x
>
>
> 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
>
Next time you report an error, please include the whole traceback, not
just the exception message. That information is included for a reason.
You might also want to print out the value of data in your updcrc
function, since that is where the problem is occurring.
Finally I might point out there is little point to the struct.unpack
since you don't use its result, but I am guessing this is because your
algorithm is currently in transition.
regards
Steve
--
Steve Holden+1 571 484 6266 +1 800 494 3119
Holden Web LLC http://www.holdenweb.com/
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From: [EMAIL PROTECTED]
CC: python-list@python.org
To: [EMAIL PROTECTED]
Date: Fri, 11 Apr 2008 08:36:02 -0500
Subject: Re: String Literal to Blob
Nope. Do not see it. My ugly stupid way works. I guess I will just proceed with
that and write my howto accordingly.
Victor
On Thu, Apr 10
