Merge pull request #516 from cool-RR/patch-1

Fix exception causes in zmqshell.py
ipython · Jun 12, 2020 · 8ec2c46 · 8ec2c46
2 parents c87ce69 + 5c24134
commit 8ec2c46
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/ipykernel/zmqshell.py b/ipykernel/zmqshell.py
@@ -423,8 +423,8 @@ def autosave(self, arg_s):
 
         try:
             interval = int(arg_s)
-        except ValueError:
-            raise UsageError("%%autosave requires an integer, got %r" % arg_s)
+        except ValueError as e:
+            raise UsageError("%%autosave requires an integer, got %r" % arg_s) from e
 
         # javascript wants milliseconds
         milliseconds = 1000 * interval
@@ -485,7 +485,7 @@ def enable_gui(self, gui):
             real_enable_gui(gui)
             self.active_eventloop = gui
         except ValueError as e:
-            raise UsageError("%s" % e)
+            raise UsageError("%s" % e) from e
 
     def init_environment(self):
         """Configure the user's environment."""