<p>I'm a long time C++/Java developer trying to get into Python and am looking for the stereotypical "Python for C++ Developers" article, but coming up blank.  I've seen these sort of things for C#, Java, etc, and they're incredibly useful for getting up to speed on language features and noteworthy differences.  Anyone have any references?</p>

<p>As a secondary bonus question, what open source Python program would you suggest looking at for clean design, commenting, and use of the language as a point of reference for study?</p>

<p>Thanks in advance.</p>

I never really understood the "Language X for Language Y developers" approach.  When I go looking to learn Language X I want to learn how to program in it the way that Language X programmers do, not the way Language Y programmers do.  I want to learn the features, idioms, etc. that are unique to the language that I am learning.  I want to be able to take advantage of the things that make the language special and use that knowledge to expand my ways of thinking and solving problems.  I don't think I would get the same sort of insights from a tutorial that was framed in the context of another language.  If you can learn your first language without a tutorial geared towards something you already know you should be able to pick up a second language the same way (and in my experience, the more languages you know the easier it is to learn new ones).
With that said, I would recommend
The Python Tutorial
as a good, quick, and easy way to get going with Python and
Dive Into Python
as a more complete introduction, also available for free
here
.  I would also agree with what others have said regarding looking at the code for the standard libraries as a source of good examples and design practices, the standard python libraries are pretty clean and easy to read.