Lodel: first draft of Settings class

.gitignore

 .venv
 .git
 .idea
-settings.py
+settings_local.py
 doc
 .*.swp

DataSource/MySQL/MySQL.py

 # -*- coding: utf8 -*-
 
-import settings
+from Lodel.settings import Settings
 
 ## @brief Manages the accesses to a MySQL datasource
 class MySQL(object):
     field_lodel_id = 'lodel_id'
     class_table_prefix = 'class_'
     objects_table_name = 'object'
-    connections = settings.DATABASE_CONNECTIONS
+    connections = Settings.get("datasource")
     ## @brief indicates if we want ON DELETE CASCADE on foreign keys
     # @todo implementation in migration handler
     fk_on_delete_cascade = False

Lodel/settings.py

+#-*- coding: utf-8 -*-
+
+import settings_local
+
+class Settings:
+    # List of accepted settings
+    datasource = None
+
+    @staticmethod
+    # @throw AttributeError if the setting is not defined in this class
+    def get(attribute):
+        value = None
+        # find the value in settings itself, if not set search in settings_local
+        value = getattr(Settings, attribute)
+        if value is None:
+            try:
+                value = getattr(settings_local, attribute)
+            except AttributeError:
+                pass
+
+        if value is not None:
+            try:
+                func = getattr(Settings, attribute + '_args')
+                value = func(value)
+            except AttributeError:
+                pass
+
+        return value
+
+    @staticmethod
+    # @throw AttributeError if the setting is not defined in this class
+    def set(attribute, value):
+        setattr(Settings, attribute, value)
+
+    @staticmethod
+    def datasource_args(value):
+        return value

settings.py.example → settings_local.py.example

 
 import pymysql
 
-DATABASE_CONNECTIONS = {
+datasource = {
     'default': {
         'module': pymysql,
         'host': '127.0.0.1',