Help: C char bits operations to python converting

[Darrell Gallion]

>>> (ord('N') - ord('A')) << 4
208
>>> ord('N')
78
>>> ord('A')
65
>>> 208-78
130
>>> 130 << 4
2080
>>> 2080 & 0xff
32      <<<<---- Was this what you expected ?
>>>

Note: Watch out for unsigned bit twiddling

--Darrell

----- Original Message ----- 
From: <gangli at msn.com>
Newsgroups: comp.lang.python
To: <python-list at python.org>
Sent: Wednesday, September 27, 2000 9:23 AM
Subject: Re: Help: C char bits operations to python converting


> In article <8qrcr7$fhe$1 at panix3.panix.com>,
>   aahz at panix.com (Aahz Maruch) wrote:
> > In article <8qr6au$hr4$1 at nnrp1.deja.com>,  <gangli at msn.com> wrote:
> > >
> > >How could I convert following C statments to Python?
> > >   char tmp_ch, tmp_ch0, tmp_ch1;
> > >   tmp_ch = 'K' - 'A';          /* -> 10 */
> > >   tmp_ch0 = ('N' - 'A') << 4;  /* -> -48 */
> > >   tmp_ch1 = tmp_ch+ tmp_ch0;   /* -> -38 */
> >
> > Use the built-in ord() function.
> 
> It only help convert "tmp_ch = 'K' - 'A';", but not others
> 
> 
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