Issue 2268 - Deprecate setupStderr()

sitescripts/__init__.py

Index: sitescripts/__init__.py
===================================================================
--- a/sitescripts/__init__.py
+++ b/sitescripts/__init__.py
@@ -0,0 +1,25 @@
+# coding: utf-8
+
+# This file is part of the Adblock Plus web scripts,
+# Copyright (C) 2006-2015 Eyeo GmbH
+#
+# Adblock Plus is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# Adblock Plus is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+
+# If connected to a terminal, show all warnings. By default (since Python 2.7)
+# deprecation warnings are ignored, because they are not of interest of users.
+# However, everybody potentially running these scripts in a terminal is working
+# on them and should be aware of all warnings.
+import sys
+if sys.stderr.isatty():
+  import warnings
+  warnings.simplefilter("default")