[EMAIL PROTECTED] wrote:
> I am pretty new to python and am having a problem
> intepreting binary data using struct.unpack.
> I am reading a file containing binary packed data
> using open with "rb". All the values are coming through
> fine when using (integer1,) = struct.unpack('l', line[86:90])
> except when line[86:90] contains "carriage-return" "linefeed"
> which are valid binary packed values. Error = unpack
> string size dows not match format. It seems that
> struct, instead of reading 4 bytes for line[86:90]
> only reads 2 bytes if the second byte is CR or LF.
verifying that struct doesn't care about newlines is of course
pretty trivial:
>>> import struct
>>> struct.unpack("l", "\0\0\0\0")
(0,)
>>> struct.unpack("l", "\0\r\0\0")
(3328,)
>>> struct.unpack("l", "\0\n\0\0")
(2560,)
have you verified that len(line) really is what you think?
>>> struct.unpack("l", "\0\r\n\0")
(658688,)
>>> struct.unpack("l", "\0\n\0")
Traceback (most recent call last):
File "<stdin>", line 1, in ?
struct.error: unpack str size does not match format
</F>
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