Web site for www.py4e.com and source to the Python 3.0 textbook

Python for Everybody (PY4E)

Course materials for www.py4e.com

The Python3 versions of the code is all in code3

If you are interested in the Python for Everybody book see the folders

• book3
• figures
• images

See the file book3/README.md for more details.

Setup On Localhost

Here are the steps to set this up on localhost on a Macintosh using MAMP.

Install MAMP (or similar) using https://www.wa4e.com/install

Check out this repo into a top level folder in htdocs

cd /Applications/MAMP/htdocs
git clone https://github.com/csev/py4e.git

Go into the newly checked out folder and get a copy of Tsugi:

cd py4e
git clone https://github.com/csev/tsugi.git

Create a database in your SQL server:

CREATE DATABASE tsugi DEFAULT CHARACTER SET utf8;
GRANT ALL ON tsugi.* TO 'ltiuser'@'localhost' IDENTIFIED BY 'ltipassword';
GRANT ALL ON tsugi.* TO 'ltiuser'@'127.0.0.1' IDENTIFIED BY 'ltipassword';

Still in the tsugi folder set up config.php:

cp config-dist.php config.php

Edit the config.php file, scroll through and set up all the variables. As you scroll through the file some of the following values are the values I use on my MAMP:

$wwwroot = 'http://localhost:8888/py4e/tsugi';   // Embedded Tsugi localhost

...

$CFG->pdo = 'mysql:host=127.0.0.1;port=8889;dbname=tsugi'; // MAMP
$CFG->dbuser    = 'ltiuser';
$CFG->dbpass    = 'ltipassword';

...

$CFG->adminpw = 'short';

...

$CFG->apphome = 'http://localhost:8888/py4e';
$CFG->context_title = "Python for Everybody";
$CFG->lessons = $CFG->dirroot.'/../lessons.json';

... 

$CFG->tool_folders = array("admin", "../tools", "../mod");
$CFG->install_folder = $CFG->dirroot.'./../mod'; // Tsugi as a store

...

$CFG->servicename = 'PY4E';

(Optional) If you want to use Google Login, go to https://console.developers.google.com/apis/credentials and create an “OAuth Client ID”. Make it a “Web Application”, give it a name, put the following into “Authorized JavaScript Origins”:

    http://localhost

And these into Authorized redirect URIs:

http://localhost/py4e/tsugi/login.php
http://localhost/py4e/tsugi/login

Note: You do not need port numbers for either of these values in your Google configuration.

Google will give you a ‘client ID’ and ‘client secret’, add them to config.php as follows:

$CFG->google_client_id = '96..snip..oogleusercontent.com';
$CFG->google_client_secret = 'R6..snip..29a';

While you are there, you could “Create credentials”, select “API key”, and name the key “My Google MAP API Key” and put the API key into config.php like the following:

$CFG->google_map_api_key = 'AIza..snip..9e8';

Starting the Application

After the above configuration is done, navigate to your application:

http://localhost:8888/py4e/

It should complain that you have not created tables and suggest you use the Admin console to do that:

http://localhost:8888/py4e/tsugi/admin

It will demand the $CFG->adminpw from config.php (above) before unlocking the admin console. Run the “Upgrade Database” option and it should create lots of tables in the database and the red warning message about bad database, should go away.

Got into the database and the lti_key table, find the row with the key_key of google.com and put a value in the secret column - anything will do - just don’t leave it empty or the internal LTI tools will not launch.

Next use the administrator interface to install the peer-grading tool from the github repository:

http://localhost:8888/py4e/tsugi/admin/install

Click on “Available Modules” and install https://github.com/tsugitools/peer-grade

The other two LTI tools are already part of the py4e repo and in wa4e/tools folder.

Using the Application

Navigate to:

http://localhost:8888/py4e/

You should click around without logging in and see if things work.

Then log in with your Google account and the UI should change. In particular you should see ‘Assignments’ and in Lessons you should start seeing LTI autograders.