luca72 wrote: > i'm using pyscard > > and for send a command he need a list like this: > > cmd = [0xdd,0xff, etc]
Note that 0xdd is exactly the same as 221: >>> 0xdd == 221 True It's just an alternative way to write an integer literal that is sometimes more convenient. Therefore you don't need the final hex() call; just s = "D3" v = int(s, 16) is enough. To build a cmd list from a list of strings use >>> string_cmd = ["D3", "FF"] >>> cmd = [int(s, 16) for s in string_cmd] >>> cmd [211, 255] Again, cmd looks different but is exactly the same as [0xd3, 0xff]: >>> cmd == [0xd3, 0xff] True > 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 > > Luca > > On 27 Nov, 10:22, Ben Finney <ben+pyt...@benfinney.id.au> wrote: >> luca72 <lucabe...@libero.it> writes: >> > str = 'D3' >> >> Be careful when choosing names. Here you have clobbered the existing >> string type binding to the name ‘str’. >> >> > and i need to trasform in 0xd3 type int and not type string how i can >> > do this? >> >> You already have the answer; you used it in your example below. I can >> only assume you're wanting something additional; what is that? >> >> > if i do hex(int(str,16) ) i obtain a string and this is not what i >> > need. >> >> You either want it as an int, or you want it as a string. Which is it? >> >> >>> foo = 'D3' >> >>> int(foo, 16) >> 211 >> >>> 0xD3 >> 211 >> >>> int(foo, 16) == 0xD3 >> True >> >> -- >> \ “Human reason is snatching everything to itself, leaving | >> `\ nothing for faith.” —Saint Bernard, 1090–1153 | >> _o__) | >> Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
