Started transfer function.

ddbank.py

@@ -2,6 +2,29 @@
 import sqlite3
 import os
 clear = lambda: os.system('clear')
+
+def transfer(a):
+    clear()
+    print()
+    connDb = sqlite3.connect(a)
+    cur = connDb.cursor()
+    userIn = input('Amount to transfer: $')
+    fromUser = input('From user: ')
+    toUser = input('To user: ')
+    fromId = cur.execute("SELECT id FROM account where username=?", (fromUser, )).fetchone()[0]
+    toId = cur.execute("SELECT id FROM account where username=?", (toUser, )).fetchone()[0]
+    prevFrom = cur.execute("SELECT balance from balance where id=?", (fromId, )).fetchone()[0]
+    prevTo = cur.execute("SELECT balance from balance where id=?", (toId, )).fetchone()[0]
+    #if prev
+    cur.execute("UPDATE balance SET balance=(?-?) WHERE id=?", (prevFrom, userIn, fromId, ))
+    cur.execute("UPDATE balance SET balance=(?+?) WHERE id=?", (prevTo, userIn, toId, ))
+    connDb.commit()
+    connDb.close()
+    clear()
+    print(f'Transfered ${userIn} from {fromUser} to {toUser}. ')
+    print()
+    manBankin(a)
+
 def deposit(a):
     clear()
     print('Deposit: ')
@@ -37,7 +60,6 @@ def withdraw(a):
         connDb.close()
 
 def manBankin(a):
-    clear()
     bankNam = a.split(".")[0]
     print(f'Transactional menu for the {bankNam} bank. ')
     while True:
@@ -54,7 +76,7 @@ def manBankin(a):
         elif userIn == "2":
             deposit(a)
         elif userIn == "3":
-            print("Transfer")
+            transfer(a)
         elif userIn == "4":
             print("User balance")
         elif userIn == "9":
@@ -84,15 +106,14 @@ def deluser(a):
 def listuser(a):
     connDb = sqlite3.connect(a)
     cur = connDb.cursor()
-    userQuery = cur.execute("SELECT username FROM account;")
-    userQuery = cur.fetchone()
+    userQuery = cur.execute("SELECT username FROM account;").fetchall()[0:]
     connDb.close()
     matchs = userQuery
     print()
     print("User list: ")
     print("__________________________")
     for i in matchs:
-        print(i.split(".")[0])
+          print(i[0])
     print("__________________________")
 
 def addUser(a):
@@ -168,7 +189,7 @@ def addBank():
          TIMESTAMP  DATETIME DEFAULT CURRENT_TIMESTAMP, ACTIVE BOOLEAN NOT NULL);''')
     connDb.execute('''CREATE TABLE balance
          (ID INTEGER PRIMARY KEY AUTOINCREMENT,
-         BALANCE           INTEGER    CHECK(BALANCE >= 0),
+         BALANCE           DOUBLE    CHECK(BALANCE >= 0),
          TIMESTAMP  DATETIME DEFAULT CURRENT_TIMESTAMP);''')
     connDb.execute('''CREATE TABLE banktrans
          (ID INTEGER PRIMARY KEY,