struct unpack

[brnstrmrs]

If I run:

testValue = '\x02\x00'
junk = struct.unpack(' h', testValue)

Everything works but If I run

testValue = raw_input("Ente r Binary Code..:") inputting at the
console '\x02\x00'
junk = struct.unpack(' h', testValue)

It errors out with
Traceback (most recent call last):
File "/home/nirmal/eDoseCheck/yennes1.py", line 9, in <module>
junk = struct.unpack(' h', testValue)
File "struct.py" , line 87, in unpack
return o.unpack(s)
error: unpack requires a string argument of length 2

any ideas?

[Ivan Illarionov]

Re: struct unpack

On Mar 17, 11:00 pm, brnstrmrs <brnstr...@gmai l.comwrote:

If I run:
>
testValue = '\x02\x00'
junk = struct.unpack(' h', testValue)
>
Everything works but If I run
>
testValue = raw_input("Ente r Binary Code..:") inputting at the
console '\x02\x00'
junk = struct.unpack(' h', testValue)
>
It errors out with
Traceback (most recent call last):
File "/home/nirmal/eDoseCheck/yennes1.py", line 9, in <module>
junk = struct.unpack(' h', testValue)
File "struct.py" , line 87, in unpack
return o.unpack(s)
error: unpack requires a string argument of length 2
>
any ideas?

You may need to use eval, because raw_input() does not understand '\'-
prefixed characters.

>>testValue = eval('"%s"' % raw_input("Ente r Binary Code..: "))

Enter Binary Code..: \x02\x00

>>junk, = struct.unpack(' h', testValue)
>>print junk

2

[Mark Tolonen]

Re: struct unpack


"brnstrmrs" <brnstrmrs@gmai l.comwrote in message
news:1878d2f6-8a87-4599-98bb-2d3d2bcbce7f@u7 2g2000hsf.googl egroups.com...

If I run:
>
testValue = '\x02\x00'
junk = struct.unpack(' h', testValue)
>
Everything works but If I run
>
testValue = raw_input("Ente r Binary Code..:") inputting at the
console '\x02\x00'
junk = struct.unpack(' h', testValue)
>
It errors out with
Traceback (most recent call last):
File "/home/nirmal/eDoseCheck/yennes1.py", line 9, in <module>
junk = struct.unpack(' h', testValue)
File "struct.py" , line 87, in unpack
return o.unpack(s)
error: unpack requires a string argument of length 2
>
any ideas?

raw_input doesn't understand escape sequences. You have to decode them.

import struct
testValue=raw_i nput() # input '\x02\x00'
junk = struct.unpack(' h',testValue.de code('string_es cape'))

--Mark