Set comprehensions don't work on Pydev (Python)

问题

{x for x in range(10)}

works perfectly on IDLE, but when I try this in eclipse (with Pydev plugin) I get a syntax error:

Undefined variable: x

Is it because Pydev doesn't support set comprehensions or something? What can I do to make this work? (This was just one example that doesn't work. All set comprehensions don't work for me).

(I'm using Python 3)

回答1:

This is a bug in PyDev; in this case ignore the editor's warning and execute the code: it will work.

I get this a lot, PyDev isn't perfect but it's good enough!

回答2:

Make sure that Pydev is configured to use Python 3.

回答3:

You can find out which version of Python you are using with

import sys
sys.stdout.write( sys.version )

来源：https://stackoverflow.com/questions/3576927/set-comprehensions-dont-work-on-pydev-python