[FIX] owdataset: Do not capture self in closure

Orange/widgets/data/owdatasets.py

@@ -44,6 +44,15 @@ def ensure_local(index_url, file_path, local_cache_path,
     return localfiles.localpath_download(*file_path, callback=progress_advance)
 
 
+def list_remote(server: str) -> Dict[Tuple[str, ...], dict]:
+    client = ServerFiles(server)
+    return client.allinfo()
+
+
+def list_local(path: str) -> Dict[Tuple[str, ...], dict]:
+    return LocalFiles(path).allinfo()
+
+
 def format_exception(error):
     # type: (BaseException) -> str
     return "\n".join(traceback.format_exception_only(type(error), error))
@@ -256,7 +265,7 @@ def __init__(self):
         self.setStatusMessage("Initializing")
 
         self._executor = ThreadPoolExecutor(max_workers=1)
-        f = self._executor.submit(self.list_remote)
+        f = self._executor.submit(list_remote, self.INDEX_URL)
         w = FutureWatcher(f, parent=self)
         w.done.connect(self.__set_index)
 
@@ -349,7 +358,7 @@ def __set_index(self, f):
         assert f.done()
         self.setBlocking(False)
         self.setStatusMessage("")
-        self.allinfo_local = self.list_local()
+        self.allinfo_local = list_local(self.local_cache_path)
 
         try:
             self.allinfo_remote = f.result()
@@ -385,7 +394,7 @@ def __set_index(self, f):
 
     def __update_cached_state(self):
         model = self.view.model().sourceModel()
-        localinfo = self.list_local()
+        localinfo = list_local(self.local_cache_path)
         assert isinstance(model, QStandardItemModel)
         allinfo = []
         for i in range(model.rowCount()):
@@ -552,15 +561,6 @@ def load_and_output(self, path):
     def load_data(path):
         return Orange.data.Table(path)
 
-    def list_remote(self):
-        # type: () -> Dict[Tuple[str, ...], dict]
-        client = ServerFiles(server=self.INDEX_URL)
-        return client.allinfo()
-
-    def list_local(self):
-        # type: () -> Dict[Tuple[str, ...], dict]
-        return LocalFiles(self.local_cache_path).allinfo()
-
 
 class FutureWatcher(QObject):
     done = Signal(object)

Orange/widgets/data/tests/test_owdatasets.py

@@ -11,19 +11,19 @@
 
 
 class TestOWDataSets(WidgetTest):
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_remote",
+    @patch("Orange.widgets.data.owdatasets.list_remote",
            Mock(side_effect=requests.exceptions.ConnectionError))
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_local",
+    @patch("Orange.widgets.data.owdatasets.list_local",
            Mock(return_value={}))
     @patch("Orange.widgets.data.owdatasets.log", Mock())
     def test_no_internet_connection(self):
         w = self.create_widget(OWDataSets)  # type: OWDataSets
         self.wait_until_stop_blocking(w)
         self.assertTrue(w.Error.no_remote_datasets.is_shown())
 
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_remote",
+    @patch("Orange.widgets.data.owdatasets.list_remote",
            Mock(side_effect=requests.exceptions.ConnectionError))
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_local",
+    @patch("Orange.widgets.data.owdatasets.list_local",
            Mock(return_value={('core', 'foo.tab'): {}}))
     @patch("Orange.widgets.data.owdatasets.log", Mock())
     def test_only_local(self):
@@ -32,9 +32,9 @@ def test_only_local(self):
         self.assertTrue(w.Warning.only_local_datasets.is_shown())
         self.assertEqual(w.view.model().rowCount(), 1)
 
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_remote",
+    @patch("Orange.widgets.data.owdatasets.list_remote",
            Mock(side_effect=requests.exceptions.ConnectionError))
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_local",
+    @patch("Orange.widgets.data.owdatasets.list_local",
            Mock(return_value={('core', 'foo.tab'): {},
                               ('core', 'bar.tab'): {}}))
     @patch("Orange.widgets.data.owdatasets.log", Mock())
@@ -49,9 +49,9 @@ def test_filtering(self):
         w.filterLineEdit.setText("")
         self.assertEqual(w.view.model().rowCount(), 2)
 
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_remote",
+    @patch("Orange.widgets.data.owdatasets.list_remote",
            Mock(return_value={('core', 'iris.tab'): {}}))
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_local",
+    @patch("Orange.widgets.data.owdatasets.list_local",
            Mock(return_value={}))
     @patch("Orange.widgets.data.owdatasets.ensure_local",
            Mock(return_value="iris.tab"))
@@ -65,9 +65,9 @@ def test_download_iris(self):
         iris = self.get_output(w.Outputs.data, w)
         self.assertEqual(len(iris), 150)
 
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_remote",
+    @patch("Orange.widgets.data.owdatasets.list_remote",
            Mock(side_effect=requests.exceptions.ConnectionError))
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_local",
+    @patch("Orange.widgets.data.owdatasets.list_local",
            Mock(return_value={('dir1', 'dir2', 'foo.tab'): {},
                               ('bar.tab',): {}}))
     @patch("Orange.widgets.data.owdatasets.log", Mock())
@@ -76,9 +76,9 @@ def test_dir_depth(self):
         self.wait_until_stop_blocking(w)
         self.assertEqual(w.view.model().rowCount(), 2)
 
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_remote",
+    @patch("Orange.widgets.data.owdatasets.list_remote",
            Mock(return_value={('core', 'iris.tab'): {}}))
-    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_local",
+    @patch("Orange.widgets.data.owdatasets.list_local",
            Mock(return_value={}))
     @patch("Orange.widgets.data.owdatasets.ensure_local",
            Mock(return_value="iris.tab"))