[Tutor] comparing lists, __lt__ and __gt__

[Sara Johnson]

Thanks Alan.  That said, any idea what it means in this context?

for key in skeys:
        fracmiss=1.*numberMissing(z[key].values())/nsites #note decimal multiplication, 1.*
        outstring="%s has %4.1f%% missing" % (key,100*fracmiss)
        if fracmiss >>0




----- Original Message ----
From: Alan Gauld <alan.gauld at btinternet.com>
To: tutor at python.org
Sent: Saturday, July 28, 2007 5:03:05 PM
Subject: Re: [Tutor] comparing lists, __lt__ and __gt__


"Sara Johnson" <sarliz73 at yahoo.com> wrote

> What if there is a '<<' or '>>'?
> Does that just mean the same thing (maybe a little over emphasized.. 
> ;)

The double chevron operator is for bit-shifting its not a camparison 
operation.
So no operator override function exists.

> I thought I saw this when I was learning boolean expressions,
> but I don't recall.

Possibly, because its often used to manipulate bitpatterns in
conjunction with bitwise boolean comparisons (and/or/xor etc)

HTH,

-- 
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld 


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