Corrected getxmp() descending into XML

Tests/test_file_jpeg.py

@@ -837,7 +837,16 @@ def test_getxmp(self):
             xmp = im.getxmp()
 
             assert isinstance(xmp, dict)
-            assert xmp["Description"]["Version"] == "10.4"
+
+            description = xmp["xmpmeta"]["RDF"]["Description"]
+            assert description["DerivedFrom"] is None
+            assert (
+                description["Look"]["Description"]["Group"]["Alt"]["li"] == "Profiles"
+            )
+            assert description["ToneCurve"]["Seq"]["li"] == ["0, 0", "255, 255"]
+
+            # Attribute
+            assert description["Version"] == "10.4"
 
 
 @pytest.mark.skipif(not is_win32(), reason="Windows only")

src/PIL/JpegImagePlugin.py

@@ -489,12 +489,29 @@ def getxmp(self):
             if segment == "APP1":
                 marker, xmp_tags = content.rsplit(b"\x00", 1)
                 if marker == b"http://ns.adobe.com/xap/1.0/":
+
+                    def get_name(tag):
+                        return tag.split("}")[1]
+
+                    def get_value(element):
+                        children = list(element)
+                        if children:
+                            value = {get_name(k): v for k, v in element.attrib.items()}
+                            for child in children:
+                                name = get_name(child.tag)
+                                child_value = get_value(child)
+                                if name in value:
+                                    if not isinstance(value[name], list):
+                                        value[name] = [value[name]]
+                                    value[name].append(child_value)
+                                else:
+                                    value[name] = child_value
+                            return value
+                        else:
+                            return element.text
+
                     root = xml.etree.ElementTree.fromstring(xmp_tags)
-                    for element in root.findall(".//"):
-                        self._xmp[element.tag.split("}")[1]] = {
-                            child.split("}")[1]: value
-                            for child, value in element.attrib.items()
-                        }
+                    self._xmp[get_name(root.tag)] = get_value(root)
         return self._xmp