Mercurial contains all of the past changes to yt. In your yt directory, go into src/yt-hg and then type 'hg tags' to list all of the tagged changsets. You can update to any of theses (e.g., 'hg update yt-2.5') and then install using the setup.py script in that directory.

--Greg

On Tue, Apr 22, 2014 at 10:07 AM, Yong Zheng <yz2505@columbia.edu> wrote:

Hi everyone,

I recently updated the yt, then realized there is a license issue with HEALPix in the new version... Is there a way that I can reverse back to my previous version (yt2.5)?

Thanks!
Yong

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