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I am in the processing learning python. I was previously learning in Python. I used version 3. Today, I installed Xubuntu 13.04. I am a very new Xubuntu user. The os had two versions pre installed. 2.7.4 and 3.3. When I type python in the console, v2.7.4 opens up. How do I change that to v3.3?

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To run Python 3, use the python3 command. To set Python 3 as default, add a symlink to /usr/local/bin as root:

sudo ln -s /usr/bin/python3 /usr/local/bin/python

After doing that, you can still execute Python 2 with python2 or python2.7.

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Type python3 instead of simply python. Python runs 2.x, whereas python3 runs 3.x

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The Debian way typically involves using update-alternatives

So for Python:

sudo update-alternatives --config python

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