struct unpack

[brnstrmrs]

If I run:

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

Everything works but If I run

testValue = raw_input("Enter 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]

If I run:

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

Everything works but If I run

testValue = raw_input("Enter 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.
2

 

[Mark Tolonen]

If I run:

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

Everything works but If I run

testValue = raw_input("Enter 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_input() # input '\x02\x00'
junk = struct.unpack('h',testValue.decode('string_escape'))

--Mark