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making python3 my default
I'm finally there. After a long time of writing books using Python 3, and teaching in Python 3 on a daily basis, I'm finally at the point where I'm changing my work environment to use Python 3 by default.
Here are the signs that convinced me it was time:
- The release of Pillow to provide PIL functionality!
- Django 1.5
- IPython and IPython notebook are fully supported -- I Love IPython Notebook
- matplotlib !!
- Sphinx, Jinja, SQLAlchemy, and many others are supported. See: https://python3wos.appspot.com/
There are a couple of projects that I use a lot that are not yet on Python3 (web2py) but I'm not going to let that stop me.
It turns out to be pretty easy to get yourself up and running on all of this stuff with Python 3. I'm on a Mac running 10.8.3. The first and most important step is to get a working version of pip for Python3. First you need to install distribute.
curl -O http://python-distribute.org/distribute_setup.pyThis will install easy_install in your Python home, but go one more step and install pip.
curl -O https://raw.github.com/pypa/pip/master/contrib/get-pip.pyThis will create a pip in your /Library/Frameworks/Python.framework/Versions/3.3/bin directory.
From there you can begin pip installing pretty much everything you need!
From my history today as I was setting everything up:
10393* pip3 install ipython
10409* pip3 install numpy
10410* pip3 install matplotlib
10429* pip3 install tornado
10430* pip3 install pyzmq
10455 pip3 install Sphinx
If you are on a Mac you will need to use easy_install to install one thing, for IPython. For some reason pip installing the readline library puts it too late in the load path to work with IPython, so you need to use easy_install-3.3 readline to get the history in IPython working just right.
Finally, you will want to add the Python 3 bin directory to your PATH. Edit your .bashrc or .zshenv file. Note that the following puts the Python 3 bin directory at the front of your PATH, making it the default when you type pip, python, or ipython. If you need to revert back to python2.7 for some task you will need to be explicit about it.
export PATH=/Library/Frameworks/Python.framework/Versions/3.3/bin:$PATH
Easy! You were expecting this to be a long and arduous process fraught with hacks and silly edits to config files. Nope, just a few basic commands. I take this as the final sign that Python 3 is here and ready to be your day to day Python.
to infinity and beyond
We passed 3 million entries in our log data for InteractivePython.org which got me to wondering about how we are growing. The site has been live for 275 days. You can really see how the site took off after day 100, which makes sense because that was bout the time fall classes started around the country. The tiny plateau between day 225 and 250 corresponds to Christmas/winter break for most schools, and now that Spring semester is in full swing it looks like the slope has gotten steeper again.
The dotted line is the linear best fit line with a slope of 12,836.7. Even if our log database is not growing exponentially thats an impressively steep slope.
And just because this is all about Python and education, here's the Python code that created the graph. I love matplotlib, it is such a powerful tool for quickly looking at your data.
import matplotlib.pyplot as plt
from numpy import polyfit, arange
f = open('bydate','r')
days = f.readlines()
totals = [0]
for d in days:
day,count = d.split('|')
count = int(count)
totals.append(totals[-1]+count)
x = arange(len(totals))
m,b = polyfit(x,totals,1)
print m
plt.plot(x,totals,x,m*x+b, '--k')
plt.ylim(ymin=0)
plt.show()
The data file is simple. One day per line with the date in one column and the number of actions in the other column. Here are the last few days:
2013-02-14 | 24349 2013-02-15 | 17396 2013-02-16 | 12645
and now it can be told
Loyal readers will remember that last summer we cruised to Alaska, and some very secretive things were happening on that cruise that I could only refer to rather cryptically. Well, with the airing of last nights episode of Top Chef the story can now be told.
We were on the set for the filming of the Quickfire challenge onboard the ship! Although the filming took several hours, we got less than 1 second of screen time. But here we are! Brian and I happened to be in a pretty good spot as the camera flashes past us several times. The ladies we were talking to turned out to be from Wisconsin, in fact from right by our cabin! The two in the print shirts actually got an additional 2 seconds of screen time along with their comments on the food.
Jane, Brian, and I all made it on again towards the end of the challenge. Sadly there is no sign of Holly.
Of course since this was all way before the show started we had no idea who any of the chefs really were. I do remember really liking Sheldon's lettuce cups as well as Stefan's little potato soup cup. I could swear that I remember seeing Kristin on the ship, so maybe she got to come along since she would be competing in last chance kitchen in Juneau.
Right now I'm looking forward to the finale. I'm not sure who I want to win the most, with Stefan and Josie gone all the villains are off the show. I think it would be awesome if Kristin makes it through LCK and gets to compete against Sheldon or Josh in the Finale. Thats Josh, by the way, in the first photo.
the debary institute
Its been a great J-Term. A trip to Vail for some Skiing, and a trip to Florida to solve the worlds problems with great friends at the DeBary Institute. For those who do not know, the DeBary institute is a newly renowned think tank with roots in the Bone Lake Global Institute.
We arrived on Friday and spent a wonderful late afternoon enjoying the hospitality and home of our host, Tim Peter.
On Saturday we toured Stetson University in the morning.
Later we repaired to Smyrna Beach, it was a bit windy but we enjoyed it all the same.
The culinary highlight of our trip was dinner at the Swamp House Grill and Tiki Bar. We enjoyed some lovely alligator bites as appetizers:
(Yes, as the famous frog said, they do taste like chicken)
After dinner we sat around enjoying the music of Mark Moore.
Sunday was Football (European and American) and then Golf day.
Dinner was provided by Gregory and Brad who made a charming seafood alfredo.
Monday morning we left the house at 5:50AM. The temperature was 62 degrees. Five hours later we arrived in Cedar Rapids where the temperature was -2. Thats a big swing for a monday morning.
Already looking forward to next year!
everyday python - new blog
I've decided that it will be best to keep my personal blog separate from the new Everyday Python blog project. All of the infrastructure to make the posts interactive just work so much better when I have control of the server and everything else. So You can head over to Everyday Python and click on the Everyday Python link there, or if you want to subscribe to the RSS feed for that project you can use this link.
vail 2013
I just got back from four awesome days of skiing in Vail and Beaver Creek.
The Colorado resorts have a really cool new way of handling the ski passes, instead of clipping a tag on your jacket you now get a credit card with an RFID chip in it. Talk about a ski pass that appeals to the Geek in me! But whats even better is that every time you go on a lift, there is an RFID reader that grabs your ID and logs that lift ride. So now at the end of the day you can go on to a website and see how many vertical feet you skiied that day. Very cool. Over our four days of skiing we did just over 95,000 vertical feet! If we'd only known how close to 100k we would get we surely would have had a shorter lunch break on day one!
Since snow started late and has been a bit sparse since Christmas there was a lot of snow making going on. The mounds of snow created by the snow machines remind you of a Dr. Seuss drawing:
I'm pleased to say that my skiing has really improved thanks to my Solomon BBR 8.9 skis. I've started to call them my magic skis because I can even do the moguls! Here's a picture I took of craig at the top of one particularly narrow and moguly run. Note that I got down first with enough time to turn around and snap some pictures.
Here's another shot of Craig just before he jumped off the cliff. Note once again who went first to take the picture: :-)
All in all it was a great four days of skiing with the guys. Can't wait until next year.
generating a password - part 1
OK, here is the first installment of the new Everyday Python series. Today I'm just providing a link, as I still have some infrastructure work to get done in order to publish each installment both here and at Runestone Interactive.
introducing everyday python
Everyday Python¶
It is always risky to make your New Years resolutions public, but this is one I’ve
been thinking about for a while now, and so I’m going to go ahead and impose a
measure of accountability on myself by proclaiming this publicly. This week, I’m
starting a series of educational blog posts here, and as a part of my Runestone
Interactive publishing project.
My idea is to publish a series of Python programming projects, aimed at solving
everyday problems, or puzzles. Hopefully these little projects will be interesting
and will give learners motivation to dig into the details of the solutions. I
will provide links to the relevant Python programming constructs and data types in
either of the two interactive books (How to think like a computer scientist:
Interactive Edition , or
Problem Solving with Algorithms and Data Structures using Python) This will let me
focus on the problems, and not the minutia of the language. Lets face it, reading
about all the different possible string methods is not that exciting, but seeing
them in action, and then wondering about what else you might be able to do with
strings is OK.
The great thing about Python is that if you write things in a straightforward
manner its pretty easy to follow even if you don’t know all the details. So, that
is my intention. Write a solution and do it in straightforward Python that
beginners can understand. Each project will appear over several days, and
will likely include some homework related to the project. I’ll provide the solution
in a followup post. In addition, I may refine the solution over the course of
several days introducing more and interesting solutions or more advanced features
of the Python language.
In the back of my mind I am drawing inspiration from the old Communications of the ACM column by John
Bently called Programming Pearls In John’s columns he would feature a particular
problem or algorithm, and present it in a straight forward way, but then he would
refine that solution again and again polishing it until he had an incredibly
elegant solution. It was beautiful because even a novice programmer could
understand what was going on at the start of the article, but would get sucked in
to the beautiful solution and would learn more than they thought possible. While
advanced programmers might chuckle at the initial solutions, even they would have
to admit that they learned something by the end of each column.
I already have a few ideas in mind for the first few projects. I’m going to try
to start fairly easy with some string and list kind of projects, and work my way up
to more complex problems and algorithms, again this is meant to be educational so
that in theory a beginner might read through these posts more or less
chronologically, and learn some computer science along the way.
Click the title to leave a comment.
euchre etiquette
How do you know you have an enduring friendship? When after more than 27 years as friends, and seven days of traveling together you can play Euchre – couple against couple – and still be friends at the end of the train ride from Seward to Anchorage. Now you might think that a simple card game means nothing, but there a few members of our party of 4 who are a little on the competitive side.
The controversy in this story came after our third missed bear siting on the train. “There’s a bear up ahead on the left side of the train… No now its on the right… no, now its on the left…” This is some kind of weird plan by the conductor to get the train rocking back and forth, or something to get the people in the back cars of the train to drink more. So, here it is dear readers, as we are all in a state of frustration over bear sitings, the up card is a heart, I’m holding three diamonds (but no bowers). Everyone passes, and it comes back around to me. I bid diamonds. This is when the trouble starts. As it turns out, Holly has both red bowers and only passed because she had better diamonds than hearts. Needless to say we get set, and I launch into some kind of self righteous tirade about “maur passing” just to set us. This scenario plays itself out three times again over the course of the train ride… Now last night I might have said some mean words about Holly’s card playing ethics, but today in hindsight, and in the spirit of type 2 fun, I can see that I might have been overly harsh in my judgement.
The card playing on the train was the culmination of a long day. The last day of a cruise is always a long hard day. For one thing, I think thats one of the things that all cruise lines suck at. You are an awesome person who must be waited on and pampered at every turn, until the last morning of the cruise. Then you yesterday’s news, who must get up early and off the ship as soon as possible, so your room can be turned over to someone new and wonderful who must be pampered at every turn. Or maybe I’m just grumpy that I’m not the new wonderful person anymore. In any case we love cruising and its ability to allow you to see great places in the world, all the while knowing that you have a safe comfortable place to eat and sleep each night.
We spent our day on a Kenai Fjord tour. We had another day of wildlife sitings. The new animals we saw today included Dahl Porpoises and up close views of Puffins and Stellar Sea Lions. The tour company was really good, it was Major Marine Tours. Its not the largest tour company in the marina but the service can’t be beat. When we got out into open ocean areas and the swells got large they were especially kind to the large number of people at the back railing “going for distance."
As I post this picture of the sea lions – whose population has been declining for the last several years – I am reminded of one especially redeeming quality of the day. SUN!! This is the first day since we left Minneapolis that we’ve had a sunny day.
After a long day, we arrived at the Anchorage train station at 10:30 PM. We got our luggage and the hotel shuttle picked us up for our ride to the hotel. Holly and I transported all of our bags to our room, while Jane and Brian stayed on the shuttle to go to the airport to get our car. We lucked out on the emerald aisle and got a good sized Dodge. At least its big enough to hold all of our luggage and all of us. We had envisioned a number of scenarios in which we stored our luggage at the hotel while we went North to Denali.
As I write this we are in our room in the Mckinley Creekside Cabins. Its not quite the same as our cabin on board the ship, but as Gabe would say, in Alaska, “Warm and Dry is more than you can hope for” We had a pretty good drive in the rain to get here, including a swell stop at the liquor store in Wasilla, and some fake pictures of where we imagine Sarah Palin might have lived. We got our tickets for tomorrows bus tour of Denali and then spent some time visiting with the sled dogs of Denali. We took the very scenic Rock Creek hiking path back to the visitors center and then headed out to Prospectors Pizza for a delicious meal.
Tomorrow will be another long day of hiking and bus riding as we go in search of Bear and Moose here in Denali National Park. We are hoping for another clear day so that we can see Mount McKinley.
- Posted using BlogPress from my iPad
Location:Alaska