[Tutor] Needing help with my account tracker program.

[Nathan Pinno]

Hey all,

I was wondering if you could help me fix a glitch in my program that's preventing it from running.

Here's the code:
accountlist = []

def load_file(ac):
    import os
    filename = 'accounts.txt'
    if os.path.exists(filename):
        store = open(filename, 'r')
        for line in store:
            account = line.strip()
            amount = line.next().strip()
            ac[account] = amount
    else:
        store = open(filename, 'w') #create a new file
    store.close

def save_file(ac):
    store = open('accounts.txt', 'w')
    for account, amount in accountlist.items():
        store.write(account + '\n')
        store.write(amount + '\n')
    store.close()

def main_menu():
    print "1) Add a new account"
    print "2) Remove a account"
    print "3) Print all info"
    print "4) Find account"
    print "5) Deposit"
    print "6) Withdraw funds"
    print "9) Save and exit."

def add():
    print "Add a new account"
    account = raw_input("Account Name: ")
    amount = float(raw_input("Amount: "))
    accountlist[account] = amount

def remove():
    print "Remove a account"
    account = raw_input("Account: ")
    if accountlist.has_key(account):
        del accountlist[account]
    else:
        print account," was not found."

def printall():
    print "Account Info"
    for account in accountlist.keys():
        print account,"\t $",accountlist[account]+"\n"

def lookup():
    print "Specific Account Info"
    account = raw_input("Account: ")
    if accountlist.has_key(account):
        print account," $",accountlist[account]
    else:
        print account," was not found."

def deposit():
    print "Deposit funds"
    account = raw_input("Account: ")
    if accountlist.has_key(account):
        amount = float(raw_input("Amount: "))
        accountlist[account] += amount
        print account,"\t $",accountlist[account]
    else:
        print account," was not found."

def withdraw():
    print "Withdraw Funds."
    account = raw_input("Account: ")
    if accountlist.has_key(account):
        amount = float(raw_input("Amount: "))
        accountlist[account] -= amount
        print account,"\t $",accountlist[account]
    else:
        print account," was not found."

print "Account Tracker"
print "By Nathan Pinno"
print
load_file(accountlist)
while 1:
    main_menu()
    menu_choice = int(raw_input("Which item? "))
    if menu_choice == 1:
        add()
    elif menu_choice == 2:
        remove()
    elif menu_choice == 3:
        printall()
    elif menu_choice == 4:
        lookup()
    elif menu_choice == 5:
        deposit()
    elif menu_choice == 6:
        withdraw()
    elif menu_choice == 9:
        break
    else:
        print "That's not an option. Please choose a valid option."
save_file(accountlist)
print "Have a nice day!"

Here is the error I'm having troubles solving:
Traceback (most recent call last):
  File "C:\Python24\Account Tracker.py", line 87, in -toplevel-
    add()
  File "C:\Python24\Account Tracker.py", line 36, in add
    accountlist[account] = amount
TypeError: list indices must be integers

So. how do I solve it to make it work the way I want it to?

Thanks,
Nathan Pinno
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