Sharing Bank Teller code

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Hey all, want to share my work regarding a Bank teller project I worked on.

I started by writing some definite variables. Of course, the numbers itself is whatever you want them to be

checking_balance = 500
savings_balance = 10000

Followed by my ‘check balance’ functions

def check_balance(account_type, checking_balance, savings_balance):
    if account_type == "savings":
        balance = savings_balance
        balance_statement = "Your {account_type} is ${balance}".format(account_type = account_type, balance = balance)
        return balance_statement
    elif account_type == "checking":
        balance = checking_balance
        balance_statement = "Your {account_type} is ${balance}".format(account_type = account_type, balance = balance)
        return balance_statement
    else:
        return "Unsucessful, please select \"checking\" or \"savings\""
        balance_statement = "Your {account_type} is ${balance}".format(account_type = account_type, balance = balance)
        return balance_statement
    elif account_type == "checking":
        balance = checking_balance
        balance_statement = "Your {account_type} is ${balance}".format(account_type = account_type, balance = balance)
        return balance_statement
    else:
        return "Unsucessful, please select \"checking\" or \"savings\""

Then my deposit functions

#Deposit    
def make_deposit(account_type, amount, checking_balance, savings_balance):
    deposit_status = ""
    if amount > 0:
        if account_type == "savings":
            savings_balance += amount
            deposit_status = "successful!"
        elif account_type == "checking":
            checking_balance += amount
            deposit_status = "successful!"
        else:
            deposit_status = "unsuccessful, please select \"checking\" or \"savings\""
    else:
        deposit_status = "unsuccessful, please enter an amount greater than 0"
    deposit_statement = "Deposit of ${amount} to your {account_type} account was {deposit_status}".format(amount = amount, account_type = account_type, deposit_status = deposit_status)
    print(deposit_statement)
    if account_type == "savings":
        return savings_balance
    elif account_type == "checking":
        return checking_balance
    else:
        return deposit_status

Next is my withdrawal functions:

#Withdrawal
def make_withdrawal(account_type, amount, checking_balance, savings_balance):
    withdrawal_status = ""
    fail = "unsuccessful, please enter amount less than balance"
    if account_type == "savings":
        if amount <= savings_balance:
            savings_balance -= amount
            withdrawal_status = "successful!"
        else:
            withdrawal_status = fail
    elif account_type == "checking":
        if amount <= checking_balance:
            checking_balance -= amount
            withdrawal_status = "successful!"
        else:
            withdrawal_status = fail
    else:
        withdrawal_status = "unsuccessful, please select \"checking\" or \"savings\""
    withdrawal_statement = "Withdrawal of ${amount} from your {account_type} is {withdrawal_status}".format(amount = amount, account_type = account_type, withdrawal_status = withdrawal_status)
    print(withdrawal_statement)
    if account_type == "savings":
        return savings_balance
    elif account_type == "checking":
        return checking_balance
    else:
        return withdrawal_status

Then my transfer functions

#Transfer
def acc_transfer(acc_from, acc_to, amount, checking_balance, savings_balance):
    transaction_status = ""
    trans_error = "unsuccessful, please enter amount less than "
    if acc_from == "savings" and acc_to == "checking":
        if savings_balance >= amount:
            savings_balance -= amount
            checking_balance += amount
            transaction_status = "successful!"
        else:
            transaction_status = trans_error + str(savings_balance)
    elif acc_from == "checking" and acc_to == "savings":
        if checking_balance >= amount:
            checking_balance -= amount
            savings_balance += amount
            transaction_status = "successful!"
        else:
            transaction_status = trans_error + str(checking_balance)
    else:
        transaction_status = "unsuccessful, please select \"checking\" or \"savings\""
    print(transaction_status)
    transaction_statement = "transfer of ${amount} from your {acc_from} to your {acc_to} account was {transaction_status}".format(amount = amount, acc_from  = acc_from, acc_to = acc_to, transaction_status = transaction_status)
    print(transaction_statement)
    return savings_balance, checking_balance

And lastly, my calls functions to confirm everything was up to snuff

#Updating the balances per transaction
savings_balance = make_withdrawal("savings", 10, checking_balance, savings_balance)
print(check_balance("savings", checking_balance, savings_balance))
checking_balance = make_deposit("checking",200, checking_balance, savings_balance)
print(check_balance("checking", checking_balance, savings_balance))
savings_balance, checking_balance = acc_transfer("checking","savings", 40, checking_balance, savings_balance)
print(check_balance("checking", checking_balance, savings_balance))
print(check_balance("savings", checking_balance, savings_balance))
savings_balance, checking_balance = acc_transfer("savings","checking", 5, checking_balance, savings_balance)
print(check_balance("checking", checking_balance, savings_balance))
print(check_balance("savings", checking_balance, savings_balance))

The instructions have been kinda unhelpful at times but I am proud that I was able to fill in the banks myself (and the internet lol)