Supporting Python 3.12

.github/workflows/unittests.yaml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-24.04
     strategy:
       matrix:
-        python: [3.9, '3.10', '3.11']
+        python: [3.9, '3.10', '3.11', '3.12']
 
     steps:
       - uses: actions/checkout@v2

armi/bookkeeping/db/database3.py

@@ -1462,7 +1462,7 @@ def _writeAttrs(obj, group, attrs):
                 )
 
                 if "attrs" not in group:
-                    attrGroup = group.create_group("attrs", track_order=True)
+                    attrGroup = group.create_group("attrs")
                 else:
                     attrGroup = group["attrs"]
                 dataName = str(len(attrGroup)) + "_" + key

armi/bookkeeping/db/layout.py

@@ -418,23 +418,34 @@ def writeToDB(self, h5group):
                 "layout/indexInData", data=self.indexInData, compression="gzip"
             )
             h5group.create_dataset(
-                "layout/numChildren", data=self.numChildren, compression="gzip"
+                "layout/numChildren",
+                data=self.numChildren,
+                compression="gzip",
+                track_order=True,
             )
             h5group.create_dataset(
-                "layout/location", data=self.location, compression="gzip"
+                "layout/location",
+                data=self.location,
+                compression="gzip",
+                track_order=True,
             )
             h5group.create_dataset(
                 "layout/locationType",
                 data=numpy.array(self.locationType).astype("S"),
                 compression="gzip",
+                track_order=True,
             )
             h5group.create_dataset(
                 "layout/material",
                 data=numpy.array(self.material).astype("S"),
                 compression="gzip",
+                track_order=True,
             )
             h5group.create_dataset(
-                "layout/temperatures", data=self.temperatures, compression="gzip"
+                "layout/temperatures",
+                data=self.temperatures,
+                compression="gzip",
+                track_order=True,
             )
 
             h5group.create_dataset(
@@ -445,31 +456,41 @@ def writeToDB(self, h5group):
                 compression="gzip",
             )
 
-            gridsGroup = h5group.create_group("layout/grids")
+            gridsGroup = h5group.create_group("layout/grids", track_order=True)
             gridsGroup.attrs["nGrids"] = len(self.gridParams)
             gridsGroup.create_dataset(
-                "type", data=numpy.array([gp[0] for gp in self.gridParams]).astype("S")
+                "type",
+                data=numpy.array([gp[0] for gp in self.gridParams]).astype("S"),
+                track_order=True,
             )
 
             for igrid, gridParams in enumerate(gp[1] for gp in self.gridParams):
-                thisGroup = gridsGroup.create_group(str(igrid))
-                thisGroup.create_dataset("unitSteps", data=gridParams.unitSteps)
+                thisGroup = gridsGroup.create_group(str(igrid), track_order=True)
+                thisGroup.create_dataset(
+                    "unitSteps", data=gridParams.unitSteps, track_order=True
+                )
 
                 for ibound, bound in enumerate(gridParams.bounds):
                     if bound is not None:
                         bound = numpy.array(bound)
-                        thisGroup.create_dataset("bounds_{}".format(ibound), data=bound)
+                        thisGroup.create_dataset(
+                            "bounds_{}".format(ibound), data=bound, track_order=True
+                        )
 
                 thisGroup.create_dataset(
-                    "unitStepLimits", data=gridParams.unitStepLimits
+                    "unitStepLimits", data=gridParams.unitStepLimits, track_order=True
                 )
 
                 offset = gridParams.offset
                 thisGroup.attrs["offset"] = offset is not None
                 if offset is not None:
-                    thisGroup.create_dataset("offset", data=offset)
-                thisGroup.create_dataset("geomType", data=gridParams.geomType)
-                thisGroup.create_dataset("symmetry", data=gridParams.symmetry)
+                    thisGroup.create_dataset("offset", data=offset, track_order=True)
+                thisGroup.create_dataset(
+                    "geomType", data=gridParams.geomType, track_order=True
+                )
+                thisGroup.create_dataset(
+                    "symmetry", data=gridParams.symmetry, track_order=True
+                )
         except RuntimeError:
             runLog.error("Failed to create datasets in: {}".format(h5group))
             raise

armi/bookkeeping/db/tests/test_database3.py

@@ -350,12 +350,13 @@ def test_mergeHistory(self):
         self.r.p.cycle = 1
         self.r.p.timeNode = 0
         tnGroup = self.db.getH5Group(self.r)
+        randomText = "this isn't a reference to another dataset"
         database3.Database3._writeAttrs(
             tnGroup["layout/serialNum"],
             tnGroup,
             {
-                "fakeBigData": numpy.eye(6400),
-                "someString": "this isn't a reference to another dataset",
+                "fakeBigData": numpy.eye(64),
+                "someString": randomText,
             },
         )
 
@@ -369,15 +370,15 @@ def test_mergeHistory(self):
 
             # this test is a little bit implementation-specific, but nice to be explicit
             self.assertEqual(
-                tnGroup["layout/serialNum"].attrs["fakeBigData"],
-                "@/c01n00/attrs/0_fakeBigData",
+                tnGroup["layout/serialNum"].attrs["someString"],
+                randomText,
             )
 
             # exercise the _resolveAttrs function
             attrs = database3.Database3._resolveAttrs(
                 tnGroup["layout/serialNum"].attrs, tnGroup
             )
-            self.assertTrue(numpy.array_equal(attrs["fakeBigData"], numpy.eye(6400)))
+            self.assertTrue(numpy.array_equal(attrs["fakeBigData"], numpy.eye(64)))
 
             keys = sorted(db2.keys())
             self.assertEqual(len(keys), 4)

armi/cases/tests/test_suiteBuilder.py

@@ -116,25 +116,25 @@ def test_buildSuite(self):
             SettingModifier("settingName2", value) for value in (3, 4, 5)
         )
 
-        self.assertEquals(builder.modifierSets[0][0].value, 1)
-        self.assertEquals(builder.modifierSets[0][1].value, 3)
+        self.assertEqual(builder.modifierSets[0][0].value, 1)
+        self.assertEqual(builder.modifierSets[0][1].value, 3)
 
-        self.assertEquals(builder.modifierSets[1][0].value, 2)
-        self.assertEquals(builder.modifierSets[1][1].value, 3)
+        self.assertEqual(builder.modifierSets[1][0].value, 2)
+        self.assertEqual(builder.modifierSets[1][1].value, 3)
 
-        self.assertEquals(builder.modifierSets[2][0].value, 1)
-        self.assertEquals(builder.modifierSets[2][1].value, 4)
+        self.assertEqual(builder.modifierSets[2][0].value, 1)
+        self.assertEqual(builder.modifierSets[2][1].value, 4)
 
-        self.assertEquals(builder.modifierSets[3][0].value, 2)
-        self.assertEquals(builder.modifierSets[3][1].value, 4)
+        self.assertEqual(builder.modifierSets[3][0].value, 2)
+        self.assertEqual(builder.modifierSets[3][1].value, 4)
 
-        self.assertEquals(builder.modifierSets[4][0].value, 1)
-        self.assertEquals(builder.modifierSets[4][1].value, 5)
+        self.assertEqual(builder.modifierSets[4][0].value, 1)
+        self.assertEqual(builder.modifierSets[4][1].value, 5)
 
-        self.assertEquals(builder.modifierSets[5][0].value, 2)
-        self.assertEquals(builder.modifierSets[5][1].value, 5)
+        self.assertEqual(builder.modifierSets[5][0].value, 2)
+        self.assertEqual(builder.modifierSets[5][1].value, 5)
 
-        self.assertEquals(len(builder.modifierSets), 6)
+        self.assertEqual(len(builder.modifierSets), 6)
 
 
 class TestSeparateEffectsBuilder(unittest.TestCase):
@@ -155,19 +155,19 @@ def test_buildSuite(self):
             SettingModifier("settingName2", value) for value in (3, 4, 5)
         )
 
-        self.assertEquals(builder.modifierSets[0][0].value, 1)
-        self.assertEquals(builder.modifierSets[0][0].settingName, "settingName1")
+        self.assertEqual(builder.modifierSets[0][0].value, 1)
+        self.assertEqual(builder.modifierSets[0][0].settingName, "settingName1")
 
-        self.assertEquals(builder.modifierSets[1][0].value, 2)
-        self.assertEquals(builder.modifierSets[1][0].settingName, "settingName1")
+        self.assertEqual(builder.modifierSets[1][0].value, 2)
+        self.assertEqual(builder.modifierSets[1][0].settingName, "settingName1")
 
-        self.assertEquals(builder.modifierSets[2][0].value, 3)
-        self.assertEquals(builder.modifierSets[2][0].settingName, "settingName2")
+        self.assertEqual(builder.modifierSets[2][0].value, 3)
+        self.assertEqual(builder.modifierSets[2][0].settingName, "settingName2")
 
-        self.assertEquals(builder.modifierSets[3][0].value, 4)
-        self.assertEquals(builder.modifierSets[3][0].settingName, "settingName2")
+        self.assertEqual(builder.modifierSets[3][0].value, 4)
+        self.assertEqual(builder.modifierSets[3][0].settingName, "settingName2")
 
-        self.assertEquals(builder.modifierSets[4][0].value, 5)
-        self.assertEquals(builder.modifierSets[4][0].settingName, "settingName2")
+        self.assertEqual(builder.modifierSets[4][0].value, 5)
+        self.assertEqual(builder.modifierSets[4][0].settingName, "settingName2")
 
-        self.assertEquals(len(builder.modifierSets), 5)
+        self.assertEqual(len(builder.modifierSets), 5)

armi/nucDirectory/tests/test_nuclideBases.py

@@ -127,13 +127,7 @@ def test_NaturalNuclide_atomicWeightIsAverageOfNaturallyOccuringIsotopes(self):
             atomicMass = 0.0
             for natIso in natNuk.getNaturalIsotopics():
                 atomicMass += natIso.abundance * natIso.weight
-            self.assertEqual(
-                atomicMass,
-                natNuk.weight,
-                "{} weight is {}, expected {}".format(
-                    natNuk, natNuk.weight, atomicMass
-                ),
-            )
+            self.assertAlmostEqual(atomicMass, natNuk.weight, delta=0.000001)
 
     def test_nucBases_labelAndNameCollsionsAreForSameNuclide(self):
         """The name and labels for correct for nuclides.

armi/reactor/assemblies.py

@@ -66,7 +66,7 @@ def __init__(self, typ, assemNum=None):
         """
         # If no assembly number is provided, generate a random number as a placeholder.
         if assemNum is None:
-            assemNum = randint(-9e12, -1)
+            assemNum = randint(-9000000000000, -1)
         name = self.makeNameFromAssemNum(assemNum)
         composites.Composite.__init__(self, name)
         self.p.assemNum = assemNum
@@ -157,7 +157,7 @@ def makeUnique(self):
         otherwise have been the same object.
         """
         # Default to a random negative assembly number (unique enough)
-        self.p.assemNum = randint(-9e12, -1)
+        self.p.assemNum = randint(-9000000000000, -1)
         self.renumber(self.p.assemNum)
 
     def add(self, obj: blocks.Block):

doc/release/0.4.rst

@@ -8,6 +8,7 @@ Release Date: TBD
 
 New Features
 ------------
+#. ARMI now supports Python 3.12. (`PR#1813 <https://github.com/terrapower/armi/pull/1813>`_)
 #. TBD
 
 API Changes

pyproject.toml

@@ -31,16 +31,19 @@ authors = [
 ]
 dependencies = [
     "coverage>=7.2.0", # Code coverage tool. Sadly baked into every Case.
-    "h5py>=3.0,<=3.9", # Needed because our database files are H5 format
+    "h5py>=3.9 ; python_version >= '3.11.0'", # Needed because our database files are H5 format
+    "h5py>=3.0,<=3.9 ; python_version < '3.11.0'",
     "htmltree>=0.7.6", # Our reports have HTML output
     "matplotlib>=3.5.3,<3.8.0", # Important plotting library
     "numpy>=1.21", # Important math library
     "ordered-set>=3.1.1", # A useful data structure
     "pluggy>=1.2.0", # Central tool behind the ARMI Plugin system
     "pyDOE>=0.3.8", # We import a Latin-hypercube algorithm to explore a phase space
     "pyevtk>=1.2.0", # Handles binary VTK visualization files
-    "ruamel.yaml.clib<=0.2.7", # C-based core of ruamel below
-    "ruamel.yaml<=0.17.21", # Our foundational YAML library
+    "ruamel.yaml.clib ; python_version >= '3.11.0'", # C-based core of ruamel below
+    "ruamel.yaml ; python_version >= '3.11.0'", # Our foundational YAML library
+    "ruamel.yaml.clib<=0.2.7 ; python_version < '3.11.0'", # C-based core of ruamel below
+    "ruamel.yaml<=0.17.21 ; python_version < '3.11.0'", # Our foundational YAML library
     "scipy>=1.7.0", # Used for curve-fitting and matrix math
     "tabulate>=0.8.9", # Used to pretty-print tabular data
     "toml>0.9.5", # Needed to parse the pyproject.toml file
@@ -58,6 +61,7 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Topic :: Scientific/Engineering :: Information Analysis",
 ]