simple elo rating system

elorating.py

@@ -158,10 +158,10 @@ class EloRatingSystem:
         k=choose_k(R2)
         player2.rating=R2+k*(1-winrate-E2)
         
-#         if player1.rating<0:
-#             player1.rating=0
-#         elif player2.rating<0:
-#             player2.rating=0
+        if player1.rating<0:
+            player1.rating=0
+        elif player2.rating<0:
+            player2.rating=0
         
         if online:
             #print('{}\'s rating:{}->{} ; {}\'s rating:{}->{}'.format(p1,R1,player1.rating,p2,R2,player2.rating))