<p> <strong><a title="sport jersey" href="http://www.jerseysup.com"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
Luca
Be careful when choosing names. Here you have clobbered the existing
string type binding to the name ‘str’.You already have the answer; you used it in your example below. I can
only assume you're wanting something additional; what is that?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__) Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â |
Ben Finney- éšè—è¢«å¼•ç”¨æ–‡å— -
- æ˜¾ç¤ºå¼•ç”¨çš„æ–‡å— -
[221, 255, 52]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
True>>> [0xdd, 0xff, 0x34] == [221, 255, 52]
i'm using pyscardand 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
luca72 said:i'm using pyscard
and for send a command he need a list like this:
cmd = [0xdd,0xff, etc]
[211, 255]string_cmd = ["D3", "FF"]
cmd = [int(s, 16) for s in string_cmd]
cmd
Truecmd == [0xd3, 0xff]
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
Be careful when choosing names. Here you have clobbered the existing
string type binding to the name ‘str’.
You already have the answer; you used it in your example below. I can
only assume you're wanting something additional; what is that?
You either want it as an int, or you want it as a string. Which is it?
True
--
\ “Human reason is snatching everything to itself, leaving |
`\ nothing for faith.†—Saint Bernard, 1090–1153 |
_o__) |
Ben Finney
luca72 said:i have checked and pyscard accept also the decimal notation,
Ben said:I don't know what that is; can you give a link to what you're referring
to?
hello i have a problem
i have this
str = 'D3'
and i need to trasform in 0xd3 type int and not type string how i can
do this?
if i do
hex(int(str,16) ) i obtain a string and this is not what i need.
thanks Luca
Simple story: he has seen the examples with hex literals and didn't know
what they were.
hello i have a problem
i have this
str = 'D3'
and i need to trasform in 0xd3 type int and not type string how i can
do this?
if i do
hex(int(str,16) ) i obtain a string and this is not what i need.
thanks Luca
i'm using pyscardand 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- æ˜¾ç¤ºå¼•ç”¨çš„æ–‡å— -
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