From mamckenna at sch.ci.lexington.ma.us  Sun Jan  1 12:00:19 2012
From: mamckenna at sch.ci.lexington.ma.us (Marianne McKenna)
Date: Sun, 01 Jan 2012 06:00:19 -0500
Subject: [Edu-sig] Edu-sig Digest, Vol 102, Issue 1
Message-ID: <fc.0119ed2a033e72833b9aca00c8ab5030.33e7284@sch.ci.lexington.ma.us>

I will be out of the office today.  If you need immediate help please
contact the computer center. Thanks.

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From calcpage at aol.com  Sun Jan  1 15:40:45 2012
From: calcpage at aol.com (A. Jorge Garcia)
Date: Sun, 01 Jan 2012 09:40:45 -0500
Subject: [Edu-sig] Edu-sig Digest, Vol 102, Issue 1
In-Reply-To: <fc.0119ed2a033e72833b9aca00c8ab5030.33e7284@sch.ci.lexington.ma.us>
References: <fc.0119ed2a033e72833b9aca00c8ab5030.33e7284@sch.ci.lexington.ma.us>
Message-ID: <f91decfb-8004-4464-8c88-74bba8657de2@email.android.com>

Marianne McKenna <mamckenna at sch.ci.lexington.ma.us> wrote:

I will be out of the office today.  If you need immediate help please contact the computer center. Thanks.


Omg
Thanx,
A. Jorge Garcia
Applied Math and CompSci
http://shadowfaxrant.blogspot.com
http://www.youtube.com/calcpage2009
Sent via DROID on Verizon Wireless
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From vceder at gmail.com  Sun Jan  1 19:19:49 2012
From: vceder at gmail.com (Vern Ceder)
Date: Sun, 1 Jan 2012 12:19:49 -0600
Subject: [Edu-sig] Edu-sig Digest, Vol 102, Issue 1
In-Reply-To: <f91decfb-8004-4464-8c88-74bba8657de2@email.android.com>
References: <fc.0119ed2a033e72833b9aca00c8ab5030.33e7284@sch.ci.lexington.ma.us>
	<f91decfb-8004-4464-8c88-74bba8657de2@email.android.com>
Message-ID: <CAAdq-kisw30MSnmfQhsdwwJNGWcpLkbKpkntKEs21g3B70x1+g@mail.gmail.com>

I think by now we're all waiting pretty anxiously for the day when Marianne
*IS* in the office... ;)

On Sun, Jan 1, 2012 at 8:40 AM, A. Jorge Garcia <calcpage at aol.com> wrote:

> ** **
> Marianne McKenna <mamckenna at sch.ci.lexington.ma.us> wrote:
>>
>> I will be out of the office today.  If you need immediate help please
>> contact the computer center. Thanks.
>>
>
> Omg
> Thanx,
> A. Jorge Garcia
> Applied Math and CompSci
> http://shadowfaxrant.blogspot.com
> http://www.youtube.com/calcpage2009
> Sent via DROID on Verizon Wireless
>
> _______________________________________________
> Edu-sig mailing list
> Edu-sig at python.org
> http://mail.python.org/mailman/listinfo/edu-sig
>
>


-- 
Vern Ceder
vceder at gmail.com, vceder at dogsinmotion.com
The Quick Python Book, 2nd Ed - http://bit.ly/bRsWDW
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From memilanuk at gmail.com  Mon Jan  2 03:22:13 2012
From: memilanuk at gmail.com (Monte Milanuk)
Date: Mon, 2 Jan 2012 02:22:13 +0000 (UTC)
Subject: [Edu-sig] Edu-sig Digest, Vol 102, Issue 1
References: <fc.0119ed2a033e72833b9aca00c8ab5030.33e7284@sch.ci.lexington.ma.us>
	<f91decfb-8004-4464-8c88-74bba8657de2@email.android.com>
	<CAAdq-kisw30MSnmfQhsdwwJNGWcpLkbKpkntKEs21g3B70x1+g@mail.gmail.com>
Message-ID: <jdr4cl$lm5$1@dough.gmane.org>

On 2012-01-01, Vern Ceder <vceder at gmail.com> wrote:
> I think by now we're all waiting pretty anxiously for the day when Marianne
> *IS* in the office... ;)


I'm getting about the point of looking for the phone number for the
computing center her auto-reply mentions and giving *them* an ear-ful
about their wayward member...


From mamckenna at sch.ci.lexington.ma.us  Mon Jan  2 12:00:30 2012
From: mamckenna at sch.ci.lexington.ma.us (Marianne McKenna)
Date: Mon, 02 Jan 2012 06:00:30 -0500
Subject: [Edu-sig] Edu-sig Digest, Vol 102, Issue 2
Message-ID: <fc.0119ed2a033e7fd33b9aca004e5d3b8a.33e7fd4@sch.ci.lexington.ma.us>

I will be out of the office today.  If you need immediate help please
contact the computer center. Thanks.

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From ufkapano at gmail.com  Tue Jan  3 11:23:14 2012
From: ufkapano at gmail.com (Andrzej Kapanowski)
Date: Tue, 3 Jan 2012 11:23:14 +0100
Subject: [Edu-sig] Strange results
Message-ID: <CAJgOTAhZjvfkCrCEGrf7dK6TsSHDkm8a_K_HxZeLiP6kF8UEXg@mail.gmail.com>

Hello!

My friend noticed strange results from Python 2.5.2:

>>> b=47
>>> 0-b/2
-23
>>> -b/2+0
-24

Anybody can explain that?

Regards,
Andrzej Kapanowski
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From kirby.urner at gmail.com  Tue Jan  3 11:42:36 2012
From: kirby.urner at gmail.com (kirby urner)
Date: Tue, 3 Jan 2012 02:42:36 -0800
Subject: [Edu-sig] Strange results
In-Reply-To: <CAJgOTAhZjvfkCrCEGrf7dK6TsSHDkm8a_K_HxZeLiP6kF8UEXg@mail.gmail.com>
References: <CAJgOTAhZjvfkCrCEGrf7dK6TsSHDkm8a_K_HxZeLiP6kF8UEXg@mail.gmail.com>
Message-ID: <CAPJgG3QYSo0qtON=wBWQJ+ZdsQfOFfq0mCaWOX=qpTSMKSHbow@mail.gmail.com>

On Tue, Jan 3, 2012 at 2:23 AM, Andrzej Kapanowski <ufkapano at gmail.com> wrote:
> Hello!
>
> My friend noticed strange results from Python 2.5.2:
>
>>>> b=47
>>>> 0-b/2
> -23
>>>> -b/2+0
> -24
>
> Anybody can explain that?
>

It's integer division:

>>> -1/2
-1
>>> 1/2
0

Not symmetrical.  Why?

http://www.peterbe.com/Integer-division-in-programming-languages

Helps some maybe.

Kirby

> Regards,
> Andrzej Kapanowski
>
>
> _______________________________________________
> Edu-sig mailing list
> Edu-sig at python.org
> http://mail.python.org/mailman/listinfo/edu-sig
>

From mamckenna at sch.ci.lexington.ma.us  Tue Jan  3 12:00:22 2012
From: mamckenna at sch.ci.lexington.ma.us (Marianne McKenna)
Date: Tue, 03 Jan 2012 06:00:22 -0500
Subject: [Edu-sig] Edu-sig Digest, Vol 102, Issue 3
Message-ID: <fc.0119ed2a033e9efd3b9aca006ec4f6df.33e9efe@sch.ci.lexington.ma.us>

I will be out of the office today.  If you need immediate help please
contact the computer center. Thanks.

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From christian.mascher at gmx.de  Tue Jan  3 13:07:02 2012
From: christian.mascher at gmx.de (Christian Mascher)
Date: Tue, 03 Jan 2012 13:07:02 +0100
Subject: [Edu-sig] Strange results
In-Reply-To: <CAJgOTAhZjvfkCrCEGrf7dK6TsSHDkm8a_K_HxZeLiP6kF8UEXg@mail.gmail.com>
References: <CAJgOTAhZjvfkCrCEGrf7dK6TsSHDkm8a_K_HxZeLiP6kF8UEXg@mail.gmail.com>
Message-ID: <4F02EF66.2090606@gmx.de>

Hi,

apart from integer-division (see Kirby's post) the result also depends 
on different interpretations of the operator "-":

> My friend noticed strange results from Python 2.5.2:
> 
>  >>> b=47
>  >>> 0-b/2
> -23

is interpreted as 0 - ( b/2) so integer division comes first before 
subtraction (- as subtraction operator).

>  >>> -b/2+0
> -24
> 

is interpreted like ( (-1) * b ) / 2 + 0
so a leading - is applied like a _multiplication_ and because * and / 
are on equal levels of execution, the left-most is evaluated first.

Always interesting how seemingly simple and "straightforward" rules can 
trip you in special circumstances. Parentheses are recommended if you 
want to be sure.

Happy new year

Christian
> Anybody can explain that?
> 
> Regards,
> Andrzej Kapanowski
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Edu-sig mailing list
> Edu-sig at python.org
> http://mail.python.org/mailman/listinfo/edu-sig


From calcpage at aol.com  Sat Jan 14 18:00:19 2012
From: calcpage at aol.com (A. Jorge Garcia)
Date: Sat, 14 Jan 2012 12:00:19 -0500 (EST)
Subject: [Edu-sig] NEW: Blogs, Videos and SmartNotes and Code!
In-Reply-To: <8CE874B5345785E-22E4-9E80E@webmail-d144.sysops.aol.com>
References: <8CE874B5345785E-22E4-9E80E@webmail-d144.sysops.aol.com>
Message-ID: <8CEA0F5214406E6-480-9C87F@webmail-d054.sysops.aol.com>

NEW: Blogs, Videos and SmartNotes and Code!
Quarter II is done!
http://shadowfaxrant.blogspot.com/2012/01/quarter-ii-week-9-screencasts.html
http://shadowfaxrant.blogspot.com/2012/01/quarter-ii-week-8-screencasts.html
http://shadowfaxrant.blogspot.com/2011/12/quarter-ii-week-7-screencasts_27.html
http://shadowfaxrant.blogspot.com/2011/12/quarter-ii-week-7-screencasts.html
http://shadowfaxrant.blogspot.com/2011/12/quarter-ii-week-5-screencasts.html
http://shadowfaxrant.blogspot.com/2011/12/quarter-ii-week-4-screencasts.html
http://shadowfaxrant.blogspot.com/2011/11/quarter-ii-week-3-screencasts.html
http://shadowfaxrant.blogspot.com/2011/11/quarter-ii-week-2-screencasts.html
http://shadowfaxrant.blogspot.com/2011/11/quarter-ii-week-1-screencasts.html

HTH,
A. Jorge Garcia
Applied Math and CompSci
http://shadowfaxrant.blogspot.com
http://www.youtube.com/calcpage2009



From kirby.urner at gmail.com  Wed Jan 18 02:53:23 2012
From: kirby.urner at gmail.com (kirby urner)
Date: Tue, 17 Jan 2012 17:53:23 -0800
Subject: [Edu-sig] Net Logo / Tractor Art
Message-ID: <CAPJgG3QJBD-upcVMLCHyUb_mmLyGOR2yzVeWTNm02QFYh+yixg@mail.gmail.com>

I'm downloading Net Logo in the background.

Logo is making a come back in this new form, thanks to "complexity studies".

http://www.flickr.com/photos/17157315 at N00/5583591181/in/set-72157625646071793

Turtles have become "agents" and the typical thing is to have thousands of them.

http://ccl.northwestern.edu/netlogo/4.1.3/

Capturing the ideas in these new "chaos" related curricula was one of
my objectives in building a super primitive ASCII graphic system built
on Tractors versus Turtles.

The Tractor-as-agent motif links me, conveniently to the Make: / DIY /
open source / hacker vision of the Open Source Tractor:

http://opensource.com/life/11/4/open-source-tractors-and-diy-manufacturing

http://theshortearedowl.wordpress.com/2011/03/01/an-open-source-tractor/

And also:  the 50 machines needed for your semi-autonomous campus /
village / community.

http://opensourceecology.org/wiki/GVCS_tools

I hope to have some of my Tractor talks ready for lightning sharing at
Pycon this March.

Early draft of my code:  http://www.4dsolutions.net/ocn/python/OST/

Kirby