Python: Fix access to globals when there's more than one

The getter for the global didn't capture the correct global_class,
just the last iteration.

This fixes the broken printer demo.

api/python/slint/__init__.py

@@ -178,11 +178,15 @@ def _build_class(compdef):
     for global_name in compdef.globals:
         global_class = _build_global_class(compdef, global_name)
 
-        def global_getter(self):
-            wrapper = global_class()
-            setattr(wrapper, "__instance__", self.__instance__)
-            return wrapper
-        properties_and_callbacks[global_name] = property(global_getter)
+        def mk_global(global_class):
+            def global_getter(self):
+                wrapper = global_class()
+                setattr(wrapper, "__instance__", self.__instance__)
+                return wrapper
+
+            return property(global_getter)
+
+        properties_and_callbacks[global_name] = mk_global(global_class)
 
     return type("SlintClassWrapper", (Component,), properties_and_callbacks)
 

api/python/tests/test_load_file.py

@@ -45,6 +45,8 @@ def test_load_file_wrapper():
 
     assert instance.MyGlobal.minus_one(100) == 99
 
+    assert instance.SecondGlobal.second == "second"
+
     del instance
 
 

api/python/tests/test_load_file.slint

@@ -9,6 +9,10 @@ export global MyGlobal {
     }
 }
 
+export global SecondGlobal {
+    out property <string> second: "second";
+}
+
 export component App inherits Window {
     in-out property <string> hello: "World";
     callback say-hello(string) -> string;