From 8eb847cd33d9343f247be06eef49fd0f13b05baf 2016-03-29 15:56:26
From: Min RK <benjaminrk@gmail.com>
Date: 2016-03-29 15:56:26
Subject: [PATCH] Merge pull request #9365 from takluyver/i9361

Show UsageError exception immediately
---

diff --git a/IPython/core/interactiveshell.py b/IPython/core/interactiveshell.py
index 357098e..a78163c 100644
--- a/IPython/core/interactiveshell.py
+++ b/IPython/core/interactiveshell.py
@@ -1771,7 +1771,7 @@ class InteractiveShell(SingletonConfigurable):
         
         These are special exceptions that shouldn't show a traceback.
         """
-        self.write_err("UsageError: %s" % exc)
+        print("UsageError: %s" % exc, file=sys.stderr)
     
     def get_exception_only(self, exc_tuple=None):
         """