New issue 766: Import of particle_trajectories fails in yt-2.6.1 (conda install) https://bitbucket.org/yt_analysis/yt/issue/766/import-of-particle_trajectori... Devin Silvia: When attempting: from yt.analysis_modules.api import AbsorptionSpectrum I got an important error (unrelated to the spectrum stuff) on particle_trajectories: http://paste.yt-project.org/show/4246/ Importing directly from absorption_spectrum gets around this, but still alerting the community that particle_trajectories seems to have an issue.