readLedger and writeLedger written

Ledger.py

@@ -0,0 +1,30 @@
+import pickle
+
+class Ledger():
+    def __init__(self) -> None:
+        self.data = [] # [ID, wins, losses, money]
+        self.indexes = {} # ID: Index
+    
+    def readLedger(self, ID):
+        data = None
+        index = self.indexes.get(ID, None)
+        if index is not None:
+            data = self.data[ID]
+        return data
+    
+    def writeLedger(self, ID, data):
+        newData = self.readLedger(ID)
+
+        if newData is not None:
+            _, wins, losses, money = newData
+            _, newWins, newLosses, newMoney = data
+            wins += newWins
+            losses += newLosses
+            money += newMoney
+            data = [ID, wins, losses, money]
+            index = self.indexes[ID]
+            self.data[index] = data
+        else:
+            self.data.append(data)
+            index = len(self.data) - 1
+            self.indexes.update({ID: index})