structures: Override __new__ to make it more pythonic

gi/overrides/Gst.py

@@ -224,6 +224,27 @@ Pipeline = override(Pipeline)
 __all__.append('Pipeline')
 
 class Structure(Gst.Structure):
+    def __new__(cls, *args, **kwargs):
+        if not args:
+            if kwargs:
+                raise TypeError("wrong arguments when creating GstStructure, first argument"
+                                " must be the structure name.")
+            return Structure.new_empty()
+        elif len(args) > 1:
+            raise TypeError("wrong arguments when creating GstStructure object")
+        elif isinstance(args[0], str):
+            if not kwargs:
+                return Structure.from_string(args[0])[0]
+            struct = Structure.new_empty(args[0])
+            for k, v in kwargs.items():
+                struct[k] = v
+
+            return struct
+        elif isinstance(args[0], Structure):
+            return args[0].copy()
+
+        raise TypeError("wrong arguments when creating GstStructure object")
+
     def __getitem__(self, key):
         return self.get_value(key)
 

testsuite/test_gst.py

@@ -76,5 +76,15 @@ class TestNotInitialized(TestCase):
             Gst.ElementFactory.make("identity", None)
 
 
+class TestStructure(TestCase):
+
+    def test_new(self):
+        Gst.init(None)
+        test = Gst.Structure('test', test=1)
+        self.assertEqual(test['test'], 1)
+
+        test = Gst.Structure('test,test=1')
+        self.assertEqual(test['test'], 1)
+
 if __name__ == "__main__":
     unittest.main()