I created a new question intended to be a community wiki: http://meta.codereview.stackexchange.com/questions/478/what-are-common-idioms-in-python Feel free to contribute to the question! Also try to add/improve answers.  :)

What do you think about a question on meta? Everybody could answer to it and comment the given idioms. It would be easy to link to specific answers from Code Review questions and the language wiki.

I think this discussion is important since it's not only about Python: other languages will follow naturally.