Understanding Python class inheritance and Sage coding convention with fruits

28 janvier 2013 | Catégories: python, sage | View Comments

Since Sage Days 20 at Marseille held in January 2010, I have been doing the same example over and over again each time I showed someone else how object oriented coding works in Python: using fruits, strawberry, oranges and bananas.

/Files/2013/fruit.png

Here is my file: fruit.py. I use to build it from scratch by adding one line at a time using attach command to see what has changed starting with Banana class, then Strawberry class then Fruit class which gathers all common methods.

This time, I wrote the complete documentation (all tests pass, coverage is 100%) and followed Sage coding convention as far as I know them. Thus, I hope this file can be useful as an example to explain those coding convention to newcomers.

One may check that all tests pass using:

$ sage -t fruit.py
sage -t  "fruit.py"
[3.7 s]

----------------------------------------------------------------------
All tests passed!
Total time for all tests: 3.8 seconds

One may check that documentation and doctest coverage is 100%:

$ sage -coverage fruit.py
----------------------------------------------------------------------
fruit.py
SCORE fruit.py: 100% (10 of 10)
----------------------------------------------------------------------
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