for read I use:
def UI24(t):
result = 0
for i in xrange(3):
result = (result << 8);
byte = unpack('>b',t[i-1])
result += byte;
return result
and for write ?
Asked
Active
Viewed 867 times
2
Emil Ivanov
- 36,548
- 11
- 71
- 90
bdfy
- 275
- 2
- 5
- 7
-
You're missing a closing quote somewhere. – Mechanical snail Aug 03 '11 at 09:14
-
t[i-1] has invalid index in the first iteration of your loop ! – rocksportrocker Aug 03 '11 at 09:18
-
Check this: http://stackoverflow.com/questions/2262100/rgb-int-to-rgb-python – Zaur Nasibov Aug 03 '11 at 09:22
2 Answers
5
Simpler to just pad them and treat as longs
>>> from struct import pack, unpack
>>> def unpack24(s):
... return unpack(">L","\0"+s)[0]
...
>>> def pack24(i):
... return pack(">L",i)[1:]
...
John La Rooy
- 281,034
- 50
- 354
- 495
0
This is not tested !
def UI24back(value):
result = ""
for i in xrange(3):
result = pack('>b', value &255) + result
value >>= 8
return result
rocksportrocker
- 7,034
- 2
- 30
- 46