replace raise by throw in the logging warnings

cdplib/log.py

@@ -7,6 +7,7 @@ import sys
 import os
 import logging
 from datetime import datetime
+import warnings
 
 sys.path.append(os.getcwd())
 
@@ -121,9 +122,20 @@ class Log():
 
         raise Exception(message)
 
+    def log_and_throw_warning(self, message):
+        '''
+        '''
+        self._logger.warning(message)
+
+        raise warnings.warn(message)
+        
     def log_and_raise_warning(self, message):
         '''
         '''
+        warnings.warn(("This method has been depricated. "
+                       "User log_and_throw_warning instead"),
+                      DeprecationWarning)
+        
         self._logger.warning(message)
 
-        raise Warning(message)
+        raise warnings.warn(message)