Bump version to 0.19.0 (#232)

Minor improvements

docs/source/conf.py

@@ -241,7 +241,7 @@
     print("Example gallery will be excluded...")
     toc_filter_exclude = ["gallery"]
 else:
-    print("NORMAL DOC")
+    print("Example gallery will be included...")
     toc_filter_exclude = []
 
 

pde/tools/expressions.py

@@ -1099,8 +1099,7 @@ def evaluate(
     # turn result into a proper field
     result_rank = result_data.ndim - grid.num_axes
     result_cls = DataFieldBase.get_class_by_rank(result_rank)
-    dtype = complex if expr.complex else float
-    return result_cls(grid, result_data, label=label, dtype=dtype)
+    return result_cls(grid, result_data, label=label)
 
 
 __all__ = [

pde/tools/tests/test_expressions.py

@@ -320,6 +320,15 @@ def test_evaluate_func_scalar():
     res = evaluate("a - x", {"a": field})
     np.testing.assert_almost_equal(res.data, 0)
 
+    field_c = ScalarField.from_expression(grid, "1 + 1j")
+    res = evaluate("c", {"c": field_c})
+    assert res.dtype == "complex"
+    np.testing.assert_almost_equal(res.data, field_c.data)
+
+    res = evaluate("abs(a)**2", {"a": field_c})
+    assert res.dtype == "float"
+    np.testing.assert_allclose(res.data, 2)
+
 
 def test_evaluate_func_vector():
     """test the evaluate function with vector fields"""

pde/version.py

@@ -4,4 +4,4 @@
 .. codeauthor:: David Zwicker <david.zwicker@ds.mpg.de>
 """
 
-__version__ = "0.18.0"
+__version__ = "0.19.0"