Fix/quam dataclass default value

CHANGELOG.md

@@ -1,7 +1,11 @@
-## [Unreleased]
+## [0.3.2]
+### Added
+- Added full QuAM documentation, including web hosting
+
 ### Fixed
 - Fix error where a numpy array of integration weights raises an error
 - Fix instantiation of a dictionary where the value is a reference
+- Fix optional parameters of a quam component parent class were sometimes categorized as a required parameter (ReadoutPulse)
 
 ## [0.3.1]
 ### Added

quam/utils/dataclass.py

@@ -16,7 +16,7 @@ class REQUIRED:
 
 
 def get_dataclass_attr_annotations(
-    cls_or_obj: Union[type, object]
+    cls_or_obj: Union[type, object],
 ) -> Dict[str, Dict[str, type]]:
     """Get the attributes and annotations of a dataclass
 
@@ -80,13 +80,6 @@ def dataclass_field_has_default(field: dataclasses.field) -> bool:
     return False
 
 
-def dataclass_has_default_fields(cls) -> bool:
-    """Check if dataclass has any default fields"""
-    fields = dataclasses.fields(cls)
-    fields_default = any(dataclass_field_has_default(field) for field in fields)
-    return fields_default
-
-
 def handle_inherited_required_fields(cls):
     """Adds a default REQUIRED flag for dataclass fields when necessary
 
@@ -95,13 +88,24 @@ def handle_inherited_required_fields(cls):
     if not is_dataclass(cls):
         return
 
-    # Check if dataclass has default fields
-    fields_required = dataclass_has_default_fields(cls)
-    if not fields_required:
+    # Check if dataclass has fields with default value
+    optional_fields = [
+        field.name
+        for field in dataclasses.fields(cls)
+        if dataclass_field_has_default(field)
+    ]
+    if not optional_fields:
+        # All fields of the dataclass are required, we don't have to handle situations
+        # where the parent class has fields with default values and the subclass has
+        # required fields.
         return
 
     # Check if class (not parents) has required fields
-    required_attrs = [attr for attr in cls.__annotations__ if attr not in cls.__dict__]
+    required_attrs = [
+        attr
+        for attr in cls.__annotations__
+        if attr not in cls.__dict__ and attr not in optional_fields
+    ]
     for attr in required_attrs:
         setattr(cls, attr, REQUIRED)
 

tests/components/pulses/test_pulses.py

@@ -4,6 +4,7 @@
 from quam.core import *
 from quam.components import *
 from quam.components.channels import Channel, IQChannel, SingleChannel
+from quam.utils.dataclass import get_dataclass_attr_annotations
 
 
 def test_drag_pulse():
@@ -183,3 +184,11 @@ def test_pulses_referenced():
         machine_loaded.channel.operations.get_unreferenced_value("pulse_referenced")
         == "#./pulse"
     )
+
+
+def test_pulse_attr_annotations():
+    from quam.components import pulses
+
+    attr_annotations = get_dataclass_attr_annotations(pulses.SquareReadoutPulse)
+
+    assert list(attr_annotations["required"]) == ["length", "amplitude"]

tests/quam_base/test_quam_dataclass.py

@@ -207,3 +207,21 @@ class C:
     assert len(f) == 2
     assert f[0].name == "int_val"
     assert f[1].name == "int_val_optional"
+
+
+def test_quam_dataclass_optional_field():
+    from quam.core import QuamComponent
+
+    @quam_dataclass
+    class RootClass(QuamComponent):
+        optional_root_attr: int = None
+
+    @quam_dataclass
+    class DerivedClass(RootClass):
+        pass
+
+    from quam.utils.dataclass import get_dataclass_attr_annotations
+
+    attr_annotations = get_dataclass_attr_annotations(DerivedClass)
+
+    assert list(attr_annotations["required"]) == []