apt/package.py: Allow to set the candidate of a package (Closes: #523997)

    + Support assignments to the 'candidate' property of Package objects.
    + Initial patch by Sebastian Heinlein

1 files changed, 13 insertions, 3 deletions

diff --git a/apt/package.py b/apt/package.py
index ec88a456..f5bdc47d 100644
--- a/apt/package.py
+++ b/apt/package.py
@@ -486,15 +486,25 @@ class Package(object):
     def __repr__(self):
         return '<Package: name:%r id:%r>' % (self._pkg.Name, self._pkg.ID)
 
-    @property
     def candidate(self):
         """Return the candidate version of the package.
-
-        :since: 0.7.9"""
+        
+        This property is writeable to allow you to set the candidate version
+        of the package. Just assign a Version() object, and it will be set as
+        the candidate version.
+        """
         cand = self._pcache._depcache.GetCandidateVer(self._pkg)
         if cand is not None:
             return Version(self, cand)
 
+    def __set_candidate(self, version):
+        """Set the candidate version of the package."""
+        self._pcache.cachePreChange()
+        self._pcache._depcache.SetCandidateVer(self._pkg, version._cand)
+        self._pcache.cachePostChange()
+
+    candidate = property(candidate, __set_candidate)
+
     @property
     def installed(self):
         """Return the currently installed version of the package.