+def cmp_package_version(a, b):
+ """
+ comparison function for tuples of the form (package-name, version ...)
+ """
+ cmp_package = cmp(a[0], b[0])
+ if cmp_package != 0:
+ return cmp_package
+ return apt_pkg.VersionCompare(a[1], b[1])
+
+#######################################################################################
+