Python: Make it possible to construct a ListModel from an iterable

Makes for a more pythonic API :)

cc #4135

api/python/slint/models.py

@@ -25,9 +25,12 @@ class Model(native.PyModelBase):
 
 
 class ListModel(Model):
-    def __init__(self, lst=None):
+    def __init__(self, iterable=None):
         super().__init__()
-        self.list = lst or []
+        if iterable is not None:
+            self.list = list(iterable)
+        else:
+            self.list = []
 
     def row_count(self):
         return len(self.list)

api/python/tests/test_models.py

@@ -83,6 +83,19 @@ def test_python_model_sequence():
     assert model[2] == 3
 
 
+def test_python_model_iterable():
+    def test_generator(max):
+        i = 0
+        while i < max:
+            yield i
+            i += 1
+
+    model = models.ListModel(test_generator(5))
+
+    assert len(model) == 5
+    assert list(model) == [0, 1, 2, 3, 4]
+
+
 def test_rust_model_sequence():
     compiler = native.ComponentCompiler()