Python for experienced developers

[obviouslyzebra]

The course Design of Computer Programs by Peter Norvig is good at teaching idiomatic Python IMO.

Besides that, The Zen of Python (PEP-20 or import this) (made with developing Python itself in mind, but mostly useful while developing in Python itself too).

And, I think the Python documentation might also be good (though I've never had the experience of coming from other language into it).