Update the API Core node

lib/volcengine/example/visual/example_potrait_effect.py

@@ -0,0 +1,21 @@
+# coding:utf-8
+from __future__ import print_function
+
+from volcengine.visual.VisualService import VisualService
+
+if __name__ == '__main__':
+    visual_service = VisualService()
+
+    # call below method if you don't set ak and sk in $HOME/.volc/config
+    visual_service.set_ak('ak')
+    visual_service.set_sk('sk')
+
+    form = {
+
+        "image_url":"https://xxx",
+        "type":"3d_cartoon",
+        "return_type":1
+    }
+
+    resp = visual_service.potrait_effect(form)
+    print(resp)