1 files changed, 35 insertions, 6 deletions
diff --git a/coverage/backward.py b/coverage/backward.py
index 637a5976..54e46254 100644
--- a/coverage/backward.py
+++ b/coverage/backward.py
@@ -24,6 +24,31 @@ except NameError:
         lst.sort()
         return lst
 
+# Python 2.3 doesn't have `reversed`.
+try:
+    reversed = reversed
+except NameError:
+    def reversed(iterable):
+        """A 2.3-compatible implementation of `reversed`."""
+        lst = list(iterable)
+        return lst[::-1]
+
+# rpartition is new in 2.5
+try:
+    "".rpartition
+except AttributeError:
+    def rpartition(s, sep):
+        """Implement s.rpartition(sep) for old Pythons."""
+        i = s.rfind(sep)
+        if i == -1:
+            return ('', '', s)
+        else:
+            return (s[:i], sep, s[i+len(sep):])
+else:
+    def rpartition(s, sep):
+        """A common interface for new Pythons."""
+        return s.rpartition(sep)
+
 # Pythons 2 and 3 differ on where to get StringIO
 try:
     from cStringIO import StringIO
@@ -49,6 +74,16 @@ try:
 except NameError:
     range = range
 
+# A function to iterate listlessly over a dict's items.
+if "iteritems" in dir({}):
+    def iitems(d):
+        """Produce the items from dict `d`."""
+        return d.iteritems()
+else:
+    def iitems(d):
+        """Produce the items from dict `d`."""
+        return d.items()
+
 # Exec is a statement in Py2, a function in Py3
 if sys.version_info >= (3, 0):
     def exec_code_object(code, global_map):
@@ -66,12 +101,6 @@ else:
             )
         )
 
-# ConfigParser was renamed to the more-standard configparser
-try:
-    import configparser
-except ImportError:
-    import ConfigParser as configparser
-
 # Reading Python source and interpreting the coding comment is a big deal.
 if sys.version_info >= (3, 0):
     # Python 3.2 provides `tokenize.open`, the best way to open source files.