feat: Allow Sequence as space= in ConfigurationSpace

src/ConfigSpace/configuration_space.py

@@ -144,6 +144,7 @@ def __init__(
                 | str
                 | Hyperparameter,
             ]
+            | Sequence[Hyperparameter]
         ) = None,
     ) -> None:
         """Initialize a configuration space.
@@ -174,9 +175,20 @@ def __init__(
                 )
                 ```
 
+                You can also use a sequence of hyperparameters:
+
+                ```python exec="true" result="python" source="material-block"
+                from ConfigSpace import ConfigurationSpace, Float, Integer
+
+                ConfigurationSpace(
+                    name="myspace",
+                    space=[Float("a", (1.0, 10.0)), Integer("b", (1, 10))]
+                )
+                ```
+
         """
         # If first arg is a dict, we assume this to be `space`
-        if isinstance(name, Mapping):
+        if isinstance(name, (Mapping, Sequence)) and not isinstance(name, str):
             space = name
             _name = None
         else:
@@ -189,7 +201,10 @@ def __init__(
         self._len = 0
 
         if space is not None:
-            hyperparameters = list(_parse_hyperparameters_from_dict(space))
+            if isinstance(space, Mapping):
+                hyperparameters = list(_parse_hyperparameters_from_dict(space))
+            elif isinstance(space, Sequence):
+                hyperparameters = list(space)
             self.add(hyperparameters)
 
     @property

test/test_configuration_space.py

@@ -48,6 +48,8 @@
     OrConjunction,
     UniformIntegerHyperparameter,
 )
+from ConfigSpace.api.types.float import Float
+from ConfigSpace.api.types.integer import Integer
 from ConfigSpace.exceptions import (
     AmbiguousConditionError,
     ChildNotFoundError,
@@ -1326,3 +1328,13 @@ def test_repr_roundtrip():
     repr = repr.replace("})", "}, configuration_space=cs)")
     config = eval(repr)  # noqa: S307
     assert default == config
+
+
+def test_configuration_space_can_be_made_with_sequence_of_hyperparameters() -> None:
+    cs = ConfigurationSpace(
+        name="myspace",
+        space=[Float("a", (1.0, 10.0)), Integer("b", (1, 10))],
+    )
+    assert len(cs) == 2
+    assert "a" in cs
+    assert "b" in cs