Network: handle object cleanup

src/network.py

@@ -62,3 +62,17 @@ class Network(util.NumberedClass):
         )
 
         self.lxc_network = self.conn.networkCreateXML(xml)
+
+    def cleanup(self):
+        if self.lxc_network:
+            self.lxc_network.destroy()
+
+    def __enter__(self):
+        self.create()
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.cleanup()
+
+    def __del__(self):
+        self.cleanup()