We are proud to announce the release of yt 3.3.4! yt (http://yt-project.org) is an open-source, community-developed toolkit for analysis and visualization of volumetric data of all types, with a particular emphasis on astrophysical and nuclear engineering simulations. yt 3.3.4 is officially the "Happy 10th Birthday to yt!" release. Version 3.3.4 is a regularly scheduled bugfix release including fixes for a number of issues reported since the release of yt 3.3.3. We urge all users to update to the latest version. If your python installation is managed via conda, update following: $ conda update -c conda-forge yt If your python installation is managed via pip, update following: $ pip install -U yt Finally, if you manage your yt installation by running out of a clone of the yt mercurial repository, update following: $ yt update We would like to thank the following people for their contributions to this release: Corentin Cadiou Nathan Goldbaum Kacper Kowalik Matthew Krafczyk A summary of changes in this release, along with the number of the pull request implementing the change follows below: Compatibility with matplotlib 2.0 (PR 2467 <https://bitbucket.org/yt_analysis/yt/pull-requests/2467>) Update the description of the yt package (PR 2472 <https://bitbucket.org/yt_analysis/yt/pull-requests/2472>) Compatibility with NumPy 1.12 under python3 (PR 2478 <https://bitbucket.org/yt_analysis/yt/pull-requests/2478>) Correctly detect some non-cosmological Ramses data as such (PR 2491 <https://bitbucket.org/yt_analysis/yt/pull-requests/2491>) Fix issue with periodic mirroring of data in the halos callback (PR 2492 <https://bitbucket.org/yt_analysis/yt/pull-requests/2492>) Ensure field data are contiguous before depositing (PR 2498 <https://bitbucket.org/yt_analysis/yt/pull-requests/2498> and PR 2518 <https://bitbucket.org/yt_analysis/yt/pull-requests/2518>) Adjust internal setup of mutable dataset attributes (PR 2501 <https://bitbucket.org/yt_analysis/yt/pull-requests/2501>) Fix issues creating box data objects (PR 2508 <https://bitbucket.org/yt_analysis/yt/pull-requests/2508>) Register __hg_version__.py with setuptools extension builder (PR 2445 <https://bitbucket.org/yt_analysis/yt/pull-requests/2445>)