added backup system!

services/utils.py

@@ -1,7 +1,21 @@
 
 import os
 
+from models.database import Database
+
 class Utils:
     @staticmethod
     def clear_screen():
-        os.system('cls' if os.name == 'nt' else 'clear')
+        os.system('cls' if os.name == 'nt' else 'clear')
+
+    @staticmethod
+    def export_db(file):
+        with open(f"./{file}", 'w') as f:
+            for line in Database.connection.iterdump():
+                f.write('%s\n' % line)
+
+    @staticmethod
+    def import_db(file):
+        with open(f"./{file}", 'r') as f:
+            str = f.read()
+            Database.connection.executescript(str)