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Set comprehensions don't work on Pydev (Python)

Answer 1

+2 A:

Make sure that Pydev is configured to use Python 3.

UncleZeiv 2010-08-26 15:58:20

I guess it is configured because I use Python 3 features all the time. But still, how do I check if it's configured to use Python 3?

snakile 2010-08-26 16:01:25

Checked. I use Python 3. What else can it be?

snakile 2010-08-26 16:06:23

Window > Preferences > Pydev > Interpreter - Python

UncleZeiv 2010-08-26 16:07:14

Can you paste the exact syntax error?

UncleZeiv 2010-08-26 16:08:02

What happens if you run the code from the shell?

UncleZeiv 2010-08-26 16:09:41

When I run this from the shell: {x for x in range(10)},that's the output: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}

snakile 2010-08-26 16:11:15

the syntax error is a warning in the editor or something you get when you run the script from pydev? In the first case, it apparently was a bug in Pydev fixed in release 1.4.3: http://mail.python.org/pipermail/python-announce-list/2009-February/007246.html

UncleZeiv 2010-08-26 16:12:54

This is the syntax error: "undefined variable x"

snakile 2010-08-26 16:13:55

Answer 2

A:

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

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

katrielalex 2010-08-26 16:00:56

I use Python 3.1.2

snakile 2010-08-26 16:07:21

Answer 3

+2 A:

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!

Beau Martínez 2010-08-26 16:44:48

Thanks. I don't like getting errors so I won't use the feature. I'll do this instead: set(x for x in range(10))

snakile 2010-08-26 21:56:35

@beau: shouldn't this have been fixed in version 1.4.3, according to the changelog? If it isn't, maybe we should issue a bug report.

UncleZeiv 2010-08-27 14:38:34

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Set comprehensions don't work on Pydev (Python)

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