Learn Python by writing tests first and then implementing the solution as per testfirst.org. Ported from Alex Chaffee's learn_ruby.

The lessons are stored in distinct directories, numbered in order of increasing difficulty:

• 00_hello
• 01_temperature
• 02_calculator
• 03_simon_says
• etc

In each directory, run the test_*.py file on the command line. For example:

$ cd 00_hello
$ ./test_hello.py

Implement hello.py a little bit at a time and fix the errors indicated by test_hello.py one by one by until there are no more errors. If you are stuck, take a look at the xx_solution branch. For example, the 00_solution branch contains a hello.py that passes all the tests in test_hello.py.