New issue 961: total mass quantity called on a clump breaks subsequent data selection https://bitbucket.org/yt_analysis/yt/issue/961/total-mass-quantity-called-on... Nathan Goldbaum: The following script: ``` #!python import numpy as np import yt from yt.analysis_modules.level_sets.api import * ds = yt.load("IsolatedGalaxy/galaxy0030/galaxy0030") data_source = ds.disk([0.5, 0.5, 0.5], [0., 0., 1.], (8, 'kpc'), (1, 'kpc')) field = ("gas", "density") step = 2.0 c_min = 10**np.floor(np.log10(data_source[field]).min() ) c_max = 10**np.floor(np.log10(data_source[field]).max()+1) master_clump = Clump(data_source, field) master_clump.add_validator("min_cells", 20) find_clumps(master_clump, c_min, c_max, step) leaf_clumps = get_lowest_clumps(master_clump) clump = leaf_clumps[3] print clump['density'] try: clump.quantities.total_mass() except Exception as e: print e print clump['density'] ``` will print out ``` #!python [ 7.07273796e-24 6.71093874e-24 6.95491269e-24 6.82937561e-24 6.80951625e-24 6.57924229e-24 7.29300493e-24 7.07554671e-24 7.30696998e-24 7.55819187e-24 7.65949253e-24 6.95166906e-24 7.52178995e-24 7.07804069e-24 6.73055650e-24 7.13322789e-24 7.65117396e-24 7.31980022e-24 7.29300148e-24 7.06273581e-24 7.00048981e-24 7.11120382e-24 6.79811352e-24 6.67183093e-24 7.16742091e-24 7.36740952e-24 7.14456988e-24 7.34582239e-24 6.71862846e-24 7.32380039e-24 7.49710554e-24 6.95885833e-24 6.82522495e-24 6.91253709e-24 7.12972196e-24 6.76674443e-24 6.97601938e-24 7.56780126e-24 7.45219661e-24 7.33906110e-24 7.06027220e-24 6.85427194e-24 6.74850585e-24 7.30664210e-24 6.73289034e-24 7.46033156e-24 7.15491925e-24 7.32940616e-24 7.13456220e-24 6.72901856e-24] g/cm**3 Can't mix particle/discrete and fluid/mesh conditions or quantities. Field: ('all', 'particle_mass') and Conditions specified: obj['contours_3ed9f4d5c4c8464d85b336044c891112'] == 18 [] g/cm**3 ``` h/t to @dcollins4096 for reporting this on the mailing list. _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org