And just for reference, when Greg and John refer to "installing yt as usual" (after switching to the desired changeset in mercurial), they mean, go to the yt-hg directory (e.g. yt-i386/src/yt-hg or yt-x86_64/src/yt-hg) and then type:

python develop

This should set you up to go.  Good luck!


On Tue, Apr 22, 2014 at 7:57 AM, Greg Meece <> wrote:
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 script in that directory.


On Tue, Apr 22, 2014 at 10:07 AM, Yong Zheng <> 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)? 


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Cameron Hummels
Postdoctoral Researcher
Steward Observatory
University of Arizona