address @paulromano's fourth round of comments

- syntax fixes
- remove `units` argument from MicroXS.from_csv and MicroXS.from_array
- make Operator warning display only when users call Operator

openmc/deplete/abc.py

@@ -529,8 +529,8 @@ class Integrator(ABC):
         initial heavy metal inventory to get total power if ``power``
         is not specified.
     source_rates : float or iterable of float, optional
-        Source rate in [neutron/sec] or neutron flux in [neut/cm^2-s] for each
-        interval in :attr:`timesteps`
+        Source rate in [neutron/sec] or neutron flux in [neutron/s-cm^2] for
+        each interval in :attr:`timesteps`
 
         .. versionadded:: 0.12.1
     timestep_units : {'s', 'min', 'h', 'd', 'MWd/kg'}

openmc/deplete/coupled_operator.py

@@ -192,13 +192,7 @@ class CoupledOperator(OpenMCOperator):
                  fission_yield_mode="constant", fission_yield_opts=None,
                  reaction_rate_mode="direct", reaction_rate_opts=None,
                  reduce_chain=False, reduce_chain_level=None):
-        # warn of name change
-        warn(
-            "The Operator(...) class has been renamed and will "
-            "be removed in a future version of OpenMC. Use "
-            "CoupledOperator(...) instead.",
-            FutureWarning
-        )
+        
         # check for old call to constructor
         if isinstance(model, openmc.Geometry):
             msg = "As of version 0.13.0 openmc.deplete.CoupledOperator " \
@@ -526,4 +520,12 @@ class CoupledOperator(OpenMCOperator):
             openmc.lib.finalize()
 
 # Retain deprecated name for the time being
-Operator = CoupledOperator
+def Operator(**args, **kwargs):
+    # warn of name change
+    warn(
+        "The Operator(...) class has been renamed and will "
+        "be removed in a future version of OpenMC. Use "
+        "CoupledOperator(...) instead.",
+        FutureWarning
+    )
+    return CoupledOperator(*args, **kwargs)

openmc/deplete/microxs.py

@@ -6,7 +6,6 @@ nuclides names as row indices and reaction names as column indices.
 
 import tempfile
 from pathlib import Path
-from os import chdir
 
 from pandas import DataFrame, read_csv, concat
 from numpy import ndarray
@@ -54,7 +53,8 @@ class MicroXS(DataFrame):
 
         Returns
         -------
-        MicroXS, cross section data in [b]
+        MicroXS
+            Cross section data in [b]
 
         """
         groups = EnergyGroups(energy_bounds)
@@ -73,15 +73,12 @@ class MicroXS(DataFrame):
         model.tallies = tallies
 
         # create temporary run
-        original_dir = Path.cwd()
-        temp_dir = tempfile.TemporaryDirectory()
-        chdir(tempfile.gettempdir())
-        statepoint_path = model.run()
-        chdir(original_dir)
+        with tempfile.TemporaryDirectory() as temp_dir:
+            statepoint_path = model.run(cwd=temp_dir)
 
-        with StatePoint(statepoint_path) as sp:
-            for rxn in xs:
-                xs[rxn].load_from_statepoint(sp)
+            with StatePoint(statepoint_path) as sp:
+                for rxn in xs:
+                    xs[rxn].load_from_statepoint(sp)
 
         # Build the DataFrame
         micro_xs = cls()
@@ -89,7 +86,7 @@ class MicroXS(DataFrame):
             df = xs[rxn].get_pandas_dataframe(xs_type='micro')
             df.index = df['nuclide']
             df.drop(['nuclide', xs[rxn].domain_type, 'group in', 'std. dev.'], axis=1, inplace=True)
-            df.rename({'mean':rxn}, axis=1, inplace=True)
+            df.rename({'mean': rxn}, axis=1, inplace=True)
             micro_xs = concat([micro_xs, df], axis=1)
 
         micro_xs._units = 'b'
@@ -100,7 +97,7 @@ class MicroXS(DataFrame):
         return micro_xs
 
     @classmethod
-    def from_array(cls, nuclides, reactions, data, units='b'):
+    def from_array(cls, nuclides, reactions, data):
         """
         Creates a ``MicroXS`` object from arrays.
 
@@ -115,8 +112,6 @@ class MicroXS(DataFrame):
         data : ndarray of floats
             Array containing one-group microscopic cross section values for
             each nuclide and reaction
-        units : {'b', 'cm^2'}
-            Units of the cross section values in ``data``
 
         Returns
         -------
@@ -133,12 +128,12 @@ class MicroXS(DataFrame):
         cls._validate_micro_xs_inputs(
             nuclides, reactions, data)
         micro_xs = cls(index=nuclides, columns=reactions, data=data)
-        micro_xs._units = units
+        micro_xs._units = 'b'
 
         return micro_xs
 
     @classmethod
-    def from_csv(cls, csv_file, units='b', **kwargs):
+    def from_csv(cls, csv_file, **kwargs):
         """
         Load a ``MicroXS`` object from a ``.csv`` file.
 
@@ -165,7 +160,7 @@ class MicroXS(DataFrame):
         cls._validate_micro_xs_inputs(list(micro_xs.index),
                                       list(micro_xs.columns),
                                       micro_xs.to_numpy())
-        micro_xs._units = units
+        micro_xs._units = 'b'
 
         return micro_xs