Add Python3 support.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/semantic_version/compat.py b/src/semantic_version/compat.py
new file mode 100644
index 0000000..51102fc
--- /dev/null
+++ b/src/semantic_version/compat.py
@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2012-2013 Raphaël Barrois
+# This code is distributed under the two-clause BSD License.
+
+import sys
+
+is_python2 = (sys.version_info[0] == 2)
+
+if is_python2:  # pragma: no cover
+    base_cmp = cmp
+else:  # pragma: no cover
+    def base_cmp(x, y):
+        if x < y:
+            return -1
+        elif x > y:
+            return 1
+        else:
+            return 0