Fix issue2550994: breakage caused by configparser backports.

Author: jsm28

CHANGES.txt

@@ -11,6 +11,17 @@ Python v2.5 and v2.6.  Starting with the v1.6 releases of Roundup
 v2.7.2 is required to run newer releases of Roundup.
 
 
+2019-??-?? 1.6.1
+
+Features:
+- doc updates. Link rot fixed and some grammar changes. (John Rouillard) 
+
+Fixed:
+
+- issue2550994: avoid breakage caused by use of backports of Python 3
+  configparser module to Python 2. (Joseph Myers)
+
+
 2018-07-13 1.6.0
 
 Features:

roundup/configuration.py

@@ -2,17 +2,22 @@
 #
 __docformat__ = "restructuredtext"
 
-try:
+# Some systems have a backport of the Python 3 configparser module to
+# Python 2: <https://pypi.org/project/configparser/>.  That breaks
+# Roundup if used with Python 2 because it generates unicode objects
+# where not expected by the Python code.  Thus, a version check is
+# used here instead of try/except.
+import sys
+if sys.version_info[0] > 2:
     import configparser			# Python 3
-except ImportError:
+else:
     import ConfigParser as configparser	# Python 2
 
 import getopt
 import imp
 import logging, logging.config
 import os
 import re
-import sys
 import time
 import smtplib