fix

python/xgboost.py

@@ -96,6 +96,8 @@ class Booster:
         dmats = ( ctypes.c_void_p  * len(cache) )(*[ ctypes.c_void_p(d.handle) for d in cache])
         self.handle = xglib.XGBoosterCreate( dmats, len(cache) )
         self.set_param( params )
+    def __del__(self):
+        xglib.XGBoosterFree(self.handle) 
     def set_param(self, params,pv=None):
         if isinstance(params,dict):
             for k, v in params.iteritems():

python/xgboost_python.cpp

@@ -170,6 +170,9 @@ extern "C"{
         }
         return new Booster( mats );
     }
+    void XGBoosterFree( void *handle ){
+        delete  static_cast<Booster*>(handle);
+    }
     void XGBoosterSetParam( void *handle, const char *name, const char *value ){
         static_cast<Booster*>(handle)->SetParam( name, value );
     }

python/xgboost_python.h

@@ -109,6 +109,11 @@ extern "C"{
      * \param create a booster
      */
     void *XGBoosterCreate( void* dmats[], size_t len ); 
+    /*! 
+     * \brief free obj in handle 
+     * \param handle handle to be freed
+     */
+    void XGBoosterFree( void* handle ); 
     /*! 
      * \brief set parameters 
      * \param handle handle