Copy to clipboard, paste into your interactive Python window, and use as the argument to sorted. Copy and paste the interpreter's output back into your code.
Fascinating to think how that doesn't mean it's bad advice. That is, unless your threat model includes targeted attacks by three-letter-scale adversaries — and then you maybe just don't open untrusted files in Emacs or use advice from strangers on HN.
Using Python's eval with empty globals and locals dicts (consult the docs) could make this safer, though I've only ever had to use that for defending against accidents rather than malice. And now this quick thing is becoming increasingly complicated, and maybe you'd be better off engineering it properly.
python-shell-send-statement, it's built into Emacs's python mode.