update asserts

examples/widgets/dropdown/lv_example_dropdown_1.py

@@ -0,0 +1,21 @@
+def event_handler(obj, event):
+    if event == lv.EVENT.VALUE_CHANGED:
+        option = " "*10 # should be large enough to store the option
+        obj.get_selected_str(option, len(option))
+        # .strip() removes trailing spaces
+        print("Option: \"%s\"" % option.strip())
+
+# Create a drop down list
+ddlist = lv.ddlist(lv.scr_act())
+ddlist.set_options("\n".join([
+                    "Apple",
+                    "Banana",
+                    "Orange",
+                    "Melon",
+                    "Grape",
+                    "Raspberry"]))
+
+ddlist.set_fix_width(150)
+ddlist.set_draw_arrow(True)
+ddlist.align(None, lv.ALIGN.IN_TOP_MID, 0, 20)
+ddlist.set_event_cb(event_handler)