I think one of the most beautiful things and also powerful are the list compreehensions, which makes the language quite interesting.
The syntax is quite simple:
[ expression for item in list if conditional ]
The tutorial  explains specifically how to do it. I confess it’s not easy to take it at first try. You can also use directly from the source .
But when you learn it, you will want to use all over your code. EVEN WHEN YOU SHOULDN’T!
In some cases, when you dont need a list actually, its better to use a simple NEXT() function.