[ENH] config: sort example workflows

Orange/canvas/config.py

@@ -176,16 +176,17 @@ def examples_entry_points():
         """
         Return an iterator over the entry points yielding 'Example Workflows'
         """
-        # `iter_entry_points` yields them in unspecified order, so we insert
-        # our first
+        # `iter_entry_points` yields them in unspecified order, so we order
+        # them by name. The default is at the beginning, unless another
+        # entrypoint precedes it alphabetically (e.g. starting with '!').
         default_ep = pkg_resources.EntryPoint(
-            "Orange3", "Orange.canvas.workflows",
+            "000-Orange3", "Orange.canvas.workflows",
             dist=pkg_resources.get_distribution("Orange3"))
 
-        return itertools.chain(
-            (default_ep,),
-            pkg_resources.iter_entry_points("orange.widgets.tutorials")
-        )
+        all_ep = list(pkg_resources.iter_entry_points("orange.widgets.tutorials"))
+        all_ep.append(default_ep)
+        all_ep.sort(key=lambda x: x.name)
+        return iter(all_ep)
 
     APPLICATION_URLS = {
         #: Submit a bug report action in the Help menu

Orange/widgets/tests/test_workflows.py

@@ -2,6 +2,7 @@
 from os import listdir, environ
 from os.path import isfile, join, dirname
 import unittest
+import pkg_resources
 
 from orangecanvas.registry import WidgetRegistry
 from orangewidget.workflow import widgetsscheme
@@ -54,3 +55,19 @@ def test_scheme_examples(self):
                               format(ows_file, str(e)))
                 finally:
                     new_scheme.clear()
+
+    def test_examples_order(self):
+        # register test entrypoints
+        dist_orange = pkg_resources.working_set.by_key['orange3']
+        ep_map = dist_orange.get_entry_map()
+        ep_first = pkg_resources.EntryPoint('!Testname', 'orangecontrib.any_addon.tutorials')
+        ep_last = pkg_resources.EntryPoint('exampletutorials', 'orangecontrib.other_addon.tutorials')
+        ep_map['orange.widgets.tutorials'] = {ep_first.name: ep_first, ep_last.name: ep_last}
+
+        entry_points = list(Config.examples_entry_points())
+
+        self.assertEqual(entry_points[0].name, ep_first.name)
+        self.assertEqual(entry_points[1].name, '000-Orange3')
+        self.assertEqual(entry_points[2].name, ep_last.name)
+
+        del ep_map['orange.widgets.tutorials']