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Python

In Greek mythology, Python is the name of a a huge serpent and sometimes a dragon. Python had been killed by the god Apollo at Delphi. Python was created out of the slime and mud left after the great flood. He was appointed by Gaia (Mother Earth) to guard the oracle of Delphi, known as Pytho.
The programming language Python has not been created out of slime and mud but out of the programming language ABC. It has been devised by a Dutch programmer, named Guido van Rossum, in Amsterdam.

Origins of Python

Guido van Rossum wrote the following about the origins of Python in a foreword for the book "Programming Python" by Mark Lutz in 1996:
"Over six years ago, in December 1989, I was looking for a "hobby" programming project that would keep me occupied during the week around Christmas. My office (a government-run research lab in Amsterdam) would be closed, but I had a home computer, and not much else on my hands. I decided to write an interpreter for the new scripting language I had been thinking about lately: a descendant of ABC that would appeal to Unix/C hackers. I chose Python as a working title for the project, being in a slightly irreverent mood (and a big fan of Monty Python's Flying Circus)."

 

Warnung:

Python2 is not supported anymore and shouldn't be used! Please consult our Python3 tutorial:

This chapter for Python3: Count Function calls with the help of a Metaclass

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Zur deutschen Webseite: Beispielanwendung für Metaklassen

Classroom Training Courses

This website contains a free and extensive online tutorial by Bernd Klein, using material from his classroom Python training courses.

If you are interested in an instructor-led classroom training course, you may have a look at the Python classes
by Bernd Klein at Bodenseo. © kabliczech - Fotolia.com

Quote of the Day:

"It is easier to write an incorrect program than understand a correct one. " (Alan Perlis)

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If you have the choice working with Python 2 or Python 3, we recomend to switch to Python 3! You can read our Python Tutorial to see what the differences are.

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Use Cases for Metaclasses

Introduction

Unfortunately, this chapter is not available for Python2.x. But there is Python 3 version available.

We recommend to continue with our chapter "Python3: Count Function Calls" of our Python3 tutorial. "Counting Function Calls" is a great use case for metaclasses.