Prefer static methods over instance methods

micro_bench/cube_generator.py

@@ -49,7 +49,8 @@ class CubeGen:
         tables['Facts'] = facts
         return tables
 
-    def generate_csv(self, tables):
+    @staticmethod
+    def generate_csv(tables):
         """
         generate csv files for the generated DataFrames
         :param tables: dict of DataFrames

olapy/core/mdx/executor/execute.py

@@ -364,7 +364,8 @@ class MdxEngine:
         return os.path.join(self.cube_path, self.cube)
 
     # TODO temporary function
-    def get_tuples(self, query, start=None, stop=None):
+    @staticmethod
+    def get_tuples(query, start=None, stop=None):
         """
         get all tuples in the mdx query