ENH: Add del UserSpace.parameters

modelx/core/space.py

@@ -1146,6 +1146,10 @@ def parameters(self, parameters):
         src = "lambda " + ", ".join(parameters) + ": None"
         self._impl.set_formula(src)
 
+    @parameters.deleter
+    def parameters(self):
+        self._impl.del_formula()
+
     def del_formula(self):
         """Delete formula"""
         self._impl.del_formula()

modelx/tests/core/space/test_set_formula.py → modelx/tests/core/space/test_formula.py

@@ -15,6 +15,7 @@ def testmodel():
 def test_formula_setter(testmodel):
 
     s = testmodel.new_space()
+    assert s.formula is None
     s.formula = param
 
     assert 'x' in s.parameters

modelx/tests/core/space/test_parameters.py

@@ -0,0 +1,42 @@
+import pytest
+import modelx as mx
+
+
+
+@pytest.fixture
+def sample_no_params():
+    m = mx.new_model()
+    m.new_space("Sample")
+    yield m
+    m._impl._check_sanity()
+    m.close()
+
+
+@pytest.fixture
+def sample_with_params(sample_no_params):
+
+    s = sample_no_params.Sample
+    assert s.parameters is None
+    s.parameters = ('x', 'y', 'Z')
+    return sample_no_params
+
+
+def test_parameters_setter(sample_no_params):
+
+    s = sample_no_params.Sample
+    assert s.parameters is None
+    s.parameters = ('x', 'y', 'Z')
+    assert s.parameters == ('x', 'y', 'Z')
+
+
+def test_parameters_deleter(sample_with_params):
+
+    s = sample_with_params.Sample
+    assert s.parameters == ('x', 'y', 'Z')
+    del s.parameters
+    assert s.parameters is None
+
+
+
+
+