PEP8 + added the action class property on the query classes

lodel/leapi/query.py

 #-*- coding: utf-8 -*-
 
-from leobject import LeObject
+from .leobject import LeObject
+
 
 class LeQueryError(Exception):
     pass
 
+
 ## @brief Handle CRUD operations on datasource
 class LeQuery(object):
     
             raise TypeError("target_class have to be a child class of LeObject")
         self._target_class = target_class
 
+
 ## @brief Handles insert queries
 class LeInsertQuery(LeQuery):
 
+    # Name of the corresponding action
+    action = 'insert'
+
     def __init__(self, target_class):
         super().__init__(target_class)
         if target_class.is_abstract():
             raise LeQueryError("Target EmClass cannot be abstract for an InsertQuery")
 
+
 ## @brief Handles Le*Query with a query_filter argument
 # @see LeGetQuery, LeUpdateQuery, LeDeleteQuery
 class LeFilteredQuery(LeQuery):
-    pass
+    # Name of the corresponding action
+    action = 'update'
+
 
 ## @brief Handles Get queries
 class LeGetQuery(LeFilteredQuery):
-    pass   
+    # Name of the corresponding action
+    action = 'get'
+
 
 ## @brief Handles Update queries
 class LeUpdateQuery(LeFilteredQuery):
-    pass
+    # Name of the corresponding action
+    action = 'update'
 
-## @biref Handles Delete queries
-class LeInsertQuery(LeFilteredQuery):
-    pass
+
+## @brief Handles Delete queries
+class LeDeleteQuery(LeFilteredQuery):
+    # Name of the corresponding action
+    action = 'delete'