> "Fredrik" == Fredrik Lundh <[EMAIL PROTECTED]> writes:
> if you want to XOR the bytes, you can do something like:
> import array
> b = array.array("B", a)
> for i in range(len(b)):
> b[i] = b[i] ^ 255
> b = b.tostring()
> or
> b = "".join([chr(ord(c) ^ 255) for
Thanks to Fredrik Lundh,It works~On 11/2/05, Fredrik Lundh <[EMAIL PROTECTED]
> wrote:"could ildg" wrote:> > so how can I do the binary stuff?
>> 8-bit strings contain bytes.>> > I want a encrypt function like below:> > def encrypt(filename,n):>> f = open(filename,"rb+")>> > a=f.read
(n)>> b = encr
"could ildg" wrote:
> > so how can I do the binary stuff?
>
> 8-bit strings contain bytes.
>
> > I want a encrypt function like below:
> > def encrypt(filename,n):
>
> f = open(filename,"rb+")
>
> > a=f.read(n)
>
> b = encrypt(a)
Thank you~~,but where is the encrypt defined?
oh, I though
could ildg wrote:
>
> b = encrypt(a)
>
> Thank you~~,but where is the encrypt defined?
>
I suppose it's left as an exercise for the reader.
Gerrit.
--
Temperature in Kiruna, Lappland, Sweden:
Tue Nov 1 15:35:25 2005 [UT] 2.6°C
--
http://mail.python.org/mailman/listi
On 11/1/05, Fredrik Lundh <[EMAIL PROTECTED]> wrote:
"could ildg" wrote:> I want to encrypt a very large birany file,> but if to change the whole file, it will take very long time,> so I just want to change n(n is an int) bytes of the file.
> but when I turned to the file I/O of python, I found tha
"could ildg" wrote:
> I want to encrypt a very large birany file,
> but if to change the whole file, it will take very long time,
> so I just want to change n(n is an int) bytes of the file.
> but when I turned to the file I/O of python, I found that file object can
> only read and write strings,
I want to encrypt a very large birany file,but if to change the whole file, it will take very long time,so I just want to change n(n is an int) bytes of the file.but when I turned to the file I/O of python, I found that file object can only read and write strings,
so how can I do the binary stuff?I
