From 199bc04b9ed2038ca0e714d3b2d5c705030f1cb6 Mon Sep 17 00:00:00 2001
From: Ned Batchelder <ned@nedbatchelder.com>
Date: Thu, 13 Apr 2017 21:54:12 -0400
Subject: Print command-line errors to stderr instead of stdout

---
 coverage/cmdline.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'coverage/cmdline.py')

diff --git a/coverage/cmdline.py b/coverage/cmdline.py
index a9af9f3..9c908b1 100644
--- a/coverage/cmdline.py
+++ b/coverage/cmdline.py
@@ -3,6 +3,8 @@
 
 """Command-line support for coverage.py."""
 
+from __future__ import print_function
+
 import glob
 import optparse
 import os.path
@@ -533,8 +535,8 @@ class CoverageScript(object):
         """Display an error message, or the named topic."""
         assert error or topic or parser
         if error:
-            print(error)
-            print("Use '%s help' for help." % (self.program_name,))
+            print(error, file=sys.stderr)
+            print("Use '%s help' for help." % (self.program_name,), file=sys.stderr)
         elif parser:
             print(parser.format_help().strip())
         else:
-- 
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