Do not set user commands as rc.__currsys__

scopesim/effects/data_container.py

@@ -65,6 +65,12 @@ class DataContainer:
     def __init__(self, filename=None, table=None, array_dict=None, cmds=None,
                  **kwargs):
         self.cmds = cmds
+        # Setting a default for cmds cannot be done here, because from_currsys
+        # checks whether cmds is None. TODO: make this possible.
+        # if self.cmds is None:
+        #     from scopesim import UserCommands
+        #     self.cmds = UserCommands()
+
         if filename is None and "file_name" in kwargs:
             warn("The 'file_name' kwarg is deprecated and will raise an error "
                  "in the future, please use 'filename' instead!",

scopesim/effects/electronic.py

@@ -105,9 +105,9 @@ def apply_to(self, obj, **kwargs):
 
         self.meta["detector_readout_mode"] = mode_name
         props_dict = self.mode_properties[mode_name]
-        rc.__currsys__["!OBS.detector_readout_mode"] = mode_name
+        self.cmds["!OBS.detector_readout_mode"] = mode_name
         for key, value in props_dict.items():
-            rc.__currsys__[key] = value
+            self.cmds[key] = value
 
         return obj
 
@@ -185,6 +185,9 @@ def __init__(self, **kwargs):
         params = {"z_order": [902]}
         self.meta.update(params)
         self.meta.update(kwargs)
+        if self.cmds is None:
+            from scopesim import UserCommands
+            self.cmds = UserCommands()
 
         required_keys = ["fill_frac", "full_well", "mindit"]
         check_keys(self.meta, required_keys, action="error")
@@ -226,8 +229,8 @@ def apply_to(self, obj, **kwargs):
             logger.info("Exposure parameters: DIT=%.3f s  NDIT=%d", dit, ndit)
             logger.info("Total exposure time: %.3f s", dit * ndit)
 
-            rc.__currsys__["!OBS.dit"] = dit
-            rc.__currsys__["!OBS.ndit"] = ndit
+            self.cmds["!OBS.dit"] = dit
+            self.cmds["!OBS.ndit"] = ndit
 
         return obj
 

scopesim/effects/fits_headers.py

@@ -425,7 +425,7 @@ class EffectsMetaKeywords(ExtraFitsKeywords):
     """
 
     def __init__(self, cmds=None, **kwargs):
-        super(ExtraFitsKeywords, self).__init__()
+        super(ExtraFitsKeywords, self).__init__(cmds=cmds, **kwargs)
         params = {"name": "effects_fits_keywords",
                   "description": "Effect Meta FITS headers",
                   "z_order": [998],
@@ -512,7 +512,7 @@ class SourceDescriptionFitsKeywords(ExtraFitsKeywords):
     """
 
     def __init__(self,  cmds=None, **kwargs):
-        super(ExtraFitsKeywords, self).__init__()
+        super(ExtraFitsKeywords, self).__init__(cmds=cmds, **kwargs)
         params = {"name": "source_fits_keywords",
                   "description": "Source description FITS headers",
                   "z_order": [997],
@@ -596,7 +596,7 @@ class SimulationConfigFitsKeywords(ExtraFitsKeywords):
     """
 
     def __init__(self, cmds=None, **kwargs):
-        super(ExtraFitsKeywords, self).__init__()
+        super(ExtraFitsKeywords, self).__init__(cmds=cmds, **kwargs)
         params = {"name": "simulation_fits_keywords",
                   "description": "Simulation Config FITS headers",
                   "z_order": [996],

scopesim/effects/psf_utils.py

@@ -109,9 +109,7 @@ def make_strehl_map_from_table(tbl, pixel_scale=1*u.arcsec):
     return map_hdu
 
 
-def rescale_kernel(image, scale_factor, spline_order=None, cmds=None):
-    if spline_order is None:
-        spline_order = utils.from_currsys("!SIM.computing.spline_order", cmds=cmds)
+def rescale_kernel(image, scale_factor, spline_order):
     sum_image = np.sum(image)
     image = zoom(image, scale_factor, order=spline_order)
     image = np.nan_to_num(image, copy=False)        # numpy version >=1.13

scopesim/effects/psfs.py

@@ -495,7 +495,8 @@ def remake_kernel(self, x):
     def wavelength(self):
         wave = from_currsys(self.meta["wavelength"], self.cmds)
         if isinstance(wave, str) and wave in tu.FILTER_DEFAULTS:
-            wave = tu.get_filter_effective_wavelength(wave, cmds=self.cmds)
+            filter_name = from_currsys(wave, cmds=self.cmds)
+            wave = tu.get_filter_effective_wavelength(filter_name)
         wave = quantify(wave, u.um).value
 
         return wave
@@ -634,7 +635,8 @@ def get_kernel(self, fov):
                 # rescaling kept inside loop to avoid rescaling for every fov
                 pix_ratio = kernel_pixel_scale / fov_pixel_scale
                 if abs(pix_ratio - 1) > self.meta["flux_accuracy"]:
-                    self.kernel = pu.rescale_kernel(self.kernel, pix_ratio)
+                    spline_order = from_currsys("!SIM.computing.spline_order", cmds=self.cmds)
+                    self.kernel = pu.rescale_kernel(self.kernel, pix_ratio, spline_order)
 
                 if ((fov.header["NAXIS1"] < hdr["NAXIS1"]) or
                     (fov.header["NAXIS2"] < hdr["NAXIS2"])):
@@ -830,8 +832,9 @@ def get_kernel(self, fov):
         # rescale the pixel scale of the kernel to match the fov images
         pix_ratio = fov_pixel_scale / kernel_pixel_scale
         if abs(pix_ratio - 1) > self.meta["flux_accuracy"]:
+            spline_order = from_currsys("!SIM.computing.spline_order", cmds=self.cmds)
             for ii, kern in enumerate(self.kernel):
-                self.kernel[ii][0] = pu.rescale_kernel(kern[0], pix_ratio)
+                self.kernel[ii][0] = pu.rescale_kernel(kern[0], pix_ratio, spline_order)
 
         for i, kern in enumerate(self.kernel):
             self.kernel[i][0] /= np.sum(kern[0])

scopesim/effects/ter_curves.py

@@ -89,7 +89,7 @@ def __init__(self, filename=None, **kwargs):
         self.meta.update(params)
         self.meta.update(kwargs)
 
-        self.surface = SpectralSurface()
+        self.surface = SpectralSurface(cmds=self.cmds)
         self.surface.meta.update(self.meta)
         self._background_source = None
 
@@ -918,6 +918,7 @@ def __init__(self, cmds=None, **kwargs):
         for name in from_currsys(self.meta["adc_names"], cmds=self.cmds):
             kwargs["name"] = name
             self.adcs[name] = TERCurve(filename=str(path).format(name),
+                                       cmds=cmds,
                                        **kwargs)
 
         self.table = self.get_table()

scopesim/effects/ter_curves_utils.py

@@ -52,7 +52,7 @@
 
 def get_filter_effective_wavelength(filter_name, cmds=None):
     if isinstance(filter_name, str):
-        filter_name = from_currsys(filter_name, cmds=cmds)
+        assert FILTER_DEFAULTS.get(filter_name), f"{filter_name} not found in FILTER_DEFAULTS"
         wave, trans = download_svo_filter(FILTER_DEFAULTS[filter_name],
                                           return_style="quantity")
         eff_wave = np.sum(wave * trans) / np.sum(trans)      # convert from Angstrom

scopesim/optics/fov_manager.py

@@ -166,8 +166,13 @@ def generate_fovs_list(self):
                 det_eff = eu.get_all_effects(self.effects, DetectorList)[0]
                 dethdr = det_eff.image_plane_header
 
-            fovs.append(FieldOfView(skyhdr, waverange, detector_header=dethdr,
-                                    **vol["meta"]))
+            fovs.append(FieldOfView(
+                skyhdr,
+                waverange,
+                detector_header=dethdr,
+                cmds=self.cmds,
+                **vol["meta"],
+            ))
 
         return fovs
 

scopesim/optics/optical_train.py

@@ -139,7 +139,10 @@ def load(self, user_commands):
         #        UserCommands via rc.__currsys__, but on the other hand some
         #        tests (now with proper patching) fail because of this type
         #        change. THIS IS A PROBLEM!
-        rc.__currsys__ = user_commands
+        # NOTE: All tests pass without setting rc.__currsys__ to user_commands.
+        #       Nevertheless, I'm a bit reluctant to removing this code just
+        #       yet. So it is commented out.
+        # rc.__currsys__ = user_commands
         self.yaml_dicts = self.cmds.yaml_dicts
         self.optics_manager = OpticsManager(self.yaml_dicts, self.cmds)
         self.update()

scopesim/tests/tests_effects/test_AutoExposure.py

@@ -6,7 +6,6 @@
 from scopesim import UserCommands
 from scopesim.optics.image_plane import ImagePlane
 from scopesim.effects.electronic import AutoExposure
-from scopesim.utils import from_currsys
 
 from scopesim.tests.mocks.py_objects.imagehdu_objects import _image_hdu_square
 
@@ -28,7 +27,7 @@ def fixture_imageplane():
     return implane
 
 
-@pytest.fixture(name="autoexposure", scope="class")
+@pytest.fixture(name="autoexposure", scope="function")
 def fixture_autoexposure():
     """Instantiate an AutoExposure object"""
     return AutoExposure(fill_frac=0.75,
@@ -45,8 +44,8 @@ def test_initialises_correctly(self):
         assert isinstance(autoexposure, AutoExposure)
 
     def test_returns_imageplane(self, autoexposure, imageplane):
-        with patch("scopesim.rc.__currsys__", _patched_cmds()):
-            outimpl = autoexposure.apply_to(imageplane)
+        autoexposure.cmds = _patched_cmds()
+        outimpl = autoexposure.apply_to(imageplane)
 
         assert isinstance(outimpl, ImagePlane)
 
@@ -59,24 +58,24 @@ def test_produces_correct_values(self, autoexposure, imageplane):
         ref_dit = 0.75
 
         # TODO: Change AutoExposure to read exptime like dit and ndit
-        with patch("scopesim.rc.__currsys__", _patched_cmds(exptime=exptime)):
-            autoexposure.apply_to(imageplane)
+        autoexposure.cmds = _patched_cmds(exptime=exptime)
+        autoexposure.apply_to(imageplane)
 
-            out_dit = from_currsys("!OBS.dit")
-            out_ndit = from_currsys("!OBS.ndit")
+        out_dit = autoexposure.cmds["!OBS.dit"]
+        out_ndit = autoexposure.cmds["!OBS.ndit"]
 
         assert out_dit == pytest.approx(ref_dit)
         assert out_dit * out_ndit == pytest.approx(exptime)
 
     def test_detects_saturation(self, imageplane):
         mindit = 0.011
-        with patch("scopesim.rc.__currsys__", _patched_cmds(exptime=100.)):
-            autoexposure = AutoExposure(fill_frac=0.75,
-                                        full_well=10.,
-                                        mindit=mindit)
-            autoexposure.apply_to(imageplane)
+        autoexposure = AutoExposure(fill_frac=0.75,
+                                    full_well=10.,
+                                    mindit=mindit,
+                                    cmds=_patched_cmds(exptime=100.))
+        autoexposure.apply_to(imageplane)
 
-            out_dit = from_currsys("!OBS.dit")
+        out_dit = autoexposure.cmds["!OBS.dit"]
 
         assert out_dit == mindit
 
@@ -85,19 +84,19 @@ def test_fill_frac_acts_correctly(self, imageplane):
         fill_2 = 0.5
         autoexp_1 = AutoExposure(fill_frac=fill_1,
                                  full_well=1e5,
-                                 mindit=0.011)
-        with patch("scopesim.rc.__currsys__", _patched_cmds()):
-            autoexp_1.apply_to(imageplane)
-            out_dit_1 = from_currsys("!OBS.dit")
-            out_ndit_1 = from_currsys("!OBS.ndit")
+                                 mindit=0.011,
+                                 cmds=_patched_cmds())
+        autoexp_1.apply_to(imageplane)
+        out_dit_1 = autoexp_1.cmds["!OBS.dit"]
+        out_ndit_1 = autoexp_1.cmds["!OBS.ndit"]
 
         autoexp_2 = AutoExposure(fill_frac=fill_2,
                                  full_well=1e5,
-                                 mindit=0.011)
-        with patch("scopesim.rc.__currsys__", _patched_cmds()):
-            autoexp_2.apply_to(imageplane)
-            out_dit_2 = from_currsys("!OBS.dit")
-            out_ndit_2 = from_currsys("!OBS.ndit")
+                                 mindit=0.011,
+                                 cmds=_patched_cmds())
+        autoexp_2.apply_to(imageplane)
+        out_dit_2 = autoexp_2.cmds["!OBS.dit"]
+        out_ndit_2 = autoexp_2.cmds["!OBS.ndit"]
 
         assert out_dit_1 == fill_1 / fill_2 * out_dit_2
         assert out_ndit_1 == fill_2 / fill_1 * out_ndit_2
@@ -108,17 +107,18 @@ def test_exptime_specified_by_dit_ndit(self, autoexposure, imageplane):
         instead of `!OBS.exptime`.
         """
         # 1. use exptime
-        with patch("scopesim.rc.__currsys__", _patched_cmds(exptime=10.)):
-            autoexposure.apply_to(imageplane)
-            dit_1 = from_currsys("!OBS.dit")
-            ndit_1 = from_currsys("!OBS.ndit")
+        autoexposure.cmds["!OBS.exptime"] = 10.0
+        autoexposure.apply_to(imageplane)
+        dit_1 = autoexposure.cmds["!OBS.dit"]
+        ndit_1 = autoexposure.cmds["!OBS.ndit"]
 
         # 2. use dit and ndit
-        with patch("scopesim.rc.__currsys__",
-                   _patched_cmds(exptime=None, dit=5, ndit=2)):
-            autoexposure.apply_to(imageplane)
-            dit_2 = from_currsys("!OBS.dit")
-            ndit_2 = from_currsys("!OBS.ndit")
+        autoexposure.cmds["!OBS.exptime"] = None
+        autoexposure.cmds["!OBS.dit"] = 5
+        autoexposure.cmds["!OBS.ndit"] = 2
+        autoexposure.apply_to(imageplane)
+        dit_2 = autoexposure.cmds["!OBS.dit"]
+        ndit_2 = autoexposure.cmds["!OBS.ndit"]
 
         assert dit_1 == dit_2
         assert ndit_1 == ndit_2
@@ -129,10 +129,10 @@ def test_exptime_at_least_mindit(self, imageplane):
         autoexposure = AutoExposure(fill_frac=0.75,
                                     full_well=1e5,
                                     mindit=mindit)
-        with patch("scopesim.rc.__currsys__", _patched_cmds(exptime=exptime)):
-            autoexposure.apply_to(imageplane)
-            dit = from_currsys("!OBS.dit")
-            ndit = from_currsys("!OBS.ndit")
+        autoexposure.cmds["!OBS.exptime"] = exptime
+        autoexposure.apply_to(imageplane)
+        dit = autoexposure.cmds["!OBS.dit"]
+        ndit = autoexposure.cmds["!OBS.ndit"]
 
         assert dit == mindit
         assert ndit == 1

scopesim/tests/tests_effects/test_fits_headers.py

@@ -301,10 +301,11 @@ def test_works(self, simplecado_opt):
                        }
                    }
                    }
-        extra_keys = fh.ExtraFitsKeywords(header_dict=hdr_dic)
-        opt_keys = fh.EffectsMetaKeywords()
-        src_keys = fh.SourceDescriptionFitsKeywords()
-        config_keys = fh.SimulationConfigFitsKeywords()
+        cmds = simplecado_opt.cmds
+        extra_keys = fh.ExtraFitsKeywords(header_dict=hdr_dic, cmds=cmds)
+        opt_keys = fh.EffectsMetaKeywords(cmds=cmds)
+        src_keys = fh.SourceDescriptionFitsKeywords(cmds=cmds)
+        config_keys = fh.SimulationConfigFitsKeywords(cmds=cmds)
 
         for eff in [src_keys, opt_keys, config_keys, extra_keys]:
             simplecado_opt.optics_manager.add_effect(eff)

scopesim/tests/tests_optics/test_OpticalTrain.py

@@ -77,6 +77,7 @@ def simplecado_opt(mock_path_yamls):
     return sim.OpticalTrain(cmd)
 
 
+@pytest.mark.usefixtures("patch_mock_path")
 class TestInit:
     def test_initialises_with_nothing(self):
         assert isinstance(OpticalTrain(), OpticalTrain)
@@ -294,7 +295,8 @@ def test_files_closed_on_shutdown(self, simplecado_opt, mock_path):
         # Add an effect with a psf
         with patch("scopesim.rc.__search_path__", [mock_path]):
             psf = sim.effects.FieldConstantPSF(filename="test_ConstPSF.fits",
-                                               name="testpsf")
+                                               name="testpsf",
+                                               cmds=simplecado_opt.cmds)
         simplecado_opt.optics_manager.add_effect(psf)
         # This is just to make sure that we have an open file
         assert not simplecado_opt['testpsf']._file._file.closed

scopesim/utils.py

@@ -877,7 +877,7 @@ def from_currsys(item, cmds=None):
         if item in cmds:
             item = cmds[item]
             if isinstance(item, str) and item.startswith("!"):
-                item = from_currsys(item)
+                item = from_currsys(item, cmds=cmds)
         else:
             raise ValueError(f"{item} was not found in rc.__currsys__")