On 11/27/2009 8:28 PM, luca72 wrote:
i'm using pyscard
and for send a command he need a list like this:
cmd = [0xdd,0xff, etc]
the problem is that i get a text
like dd
and i need to trasform it in 0xdd for the list and if i use hex i have
a sting that is not what i need
>>> # Do you know that when you write
>>> somelist = [0xdd, 0xff, 0x34]
>>> # python read it as
>>> somelist
[221, 255, 52]
All int in python (and in fact most computers) is stored as binary
digits; when you need a textual representation the binary digits is
transformed into string (even decimal representation [!]). When python
evaluates an integer literal expression, it converts them from whatever
base it is originally in [1] to binary.
[1] determined by the prefix: 0b -> binary, 0x -> hexadecimal, 0o ->
octal, and unprefixed -> decimal.
thus:
>>> [0xdd, 0xff, 0x34] == [221, 255, 52]
True
--
http://mail.python.org/mailman/listinfo/python-list
