>>> import binascii
>>> f1 = 'c:\\temp\\allhex.txt'
>>> f2 = 'c:\\temp\\allbin.txt'
>>> sf = open(f1, 'rU')
>>> df = open(f2, 'w')
>>> slines = sf.readlines()
>>> for line in slines:

>>> df.close()
>>> sf.close()

>>> x
'0164'
>>> y

Vishal wrote:
> I have a file with a long list of hex characters, and I want to get a
> file with corresponding binary characters

> here's what I did:

>>>> import binascii
>>>> f1 = 'c:\\temp\\allhex.txt'
>>>> f2 = 'c:\\temp\\allbin.txt'
>>>> sf = open(f1, 'rU')
>>>> df = open(f2, 'w')
>>>> slines = sf.readlines()
>>>> for line in slines:
> ...   x = line.rstrip('\n')
> ...   y = binascii.unhexlify(x)
> ...   df.write(y)
> ...
>>>> df.close()
>>>> sf.close()

> But what I get is all garbage, atleast textpad and notepad show that
> I tried doing it for only one string, and this is what I am seeing on
> the interpreter:

>>>> x
> '0164'
>>>> y
> '\x01d'

> I was expecting 'y' would come out as a string with binary
> characters!!!

> What am i missing here? Can someone please help.