Re: help tranlating perl expressions


"David Bear" <david.bear@xxxxxxx> wrote in message
news:5452284.reKt6RD0Uf@xxxxxxxxxx

my $klen = length($key);
my $blen = 64;
my $ipad = chr(0x36)x$blen;
my $opad = chr(0x5c)x$blen;

I don't know if I ever seen any way in python of created a fixed size
string. Can anyone show me how to implement the same statements in python?

Certainly, you can create fixed-length strings in python:
n = 7
chr(0x36) * n
'6666666'

I when python XOR's strings, is it the same as when perl xor's them?
No, XOR is a bitwise operation that does not apply to strings.

5 ^ 0
5
5 ^ 0xF
10
'a' ^ 'b'
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: unsupported operand type(s) for ^: 'str' and 'str'

See also the 'struct' module: http://docs.python.org/lib/module-struct.html


.

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