Background information on Python 3

What is Python?

Python is an interpreted language.
Python uses dynamic typing.
Python 3 is not compatible to Python 2.x
The Python interpreter generates intermediate code (in the pycache directory).

Strengths

Quick to write, no compilation
Fully object-oriented
Many reliable libraries
All-round language
100% free software

Weaknesses

Writing very fast programs is not straightforward
No strict encapsulation

What has changed from Python 2 to Python 3?

print is now a function
all Strings are stored in Unicode (better handling of umlauts and special characters in all languages)
many functions like zip(), map() and filter() return iterators
the standard library has been cleaned up completely