how to separate hexadecimal

[Nick Coghlan]

Nick Coghlan wrote:
> When not working at the hardware level, just go with the definition:
> 
> Py> def complement(val, limit=256):
> ...   if val >= limit or val < 0:
> ...     raise ValueError("Value out of range for complemented format")
> ...   if val == 0:
> ...     return 0
> ...   return limit - val
> ...
> Py> hex(complement(0x55))
> '0xab'
> Py> hex(complement(0x55, 256*256))
> '0xffab'

Or there's the simplest definition:

Py> def complement(val, limit=256):
...   return (limit - val) % limit
...
Py> hex(complement(0x55))
'0xab'
Py> hex(complement(-0x55))
'0x55'
Py> hex(complement(0xab))
'0x55'
Py> hex(complement(-0xab))
'0xab'

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
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