[Verba] Nemesis Coding (revisited) and DNA coding

[Stuart D. Gathman]

On Sun, 29 Jan 2006, Stuart D. Gathman wrote:

> Here is an outline of your program to get you started.  It will use all 
> the things you have (hopefully) learned so far.
> 
> 1.  Make a function (remember 'def') to convert the letters of a DNA
>     sequence to a number.
> 
> 2.  Make a function to convert a number to the letters of a DNA sequence.  
>     (You need some sophisticated equipment to actually convert to a DNA
>     sequence :-)
> 
> 3.  Read a sequence, convert to a number, NOT, convert to letters again, 
>     print.

Actually, it is simpler if you just build the antisense letter by letter.
So ignore the above.

You might want to use a feature of python we haven't encountered yet:
the "for" loop.  Strings, tuples, and lists are sequences.  You can
do something with each member of a sequence in turn like this:

>>> s = 'ABC'
>>> for c in s: print ord(c),
...
65 66 67

You will find this very useful.

-- 
	      Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.