[Tutor] Newby Still Lost with GUI!!!

[moore william]

I am trying inhance my program to create a GUI
interface instead of my current one. However I am
coming up with "amount" and "self" are not defined. I
thought I did this earlier. How would I go about
creating the GUI and where did I miss my defentition?
Thanks in advance for any guidence!

import shelve

s = shelve.open('d:/College/numberdata')

if s.has_key('numbers'):
    numbers = s['numbers']
else:
    numbers = {}

class AccountTransaction(object):
    def __init__(self, amount, time):
        self.amount = amount
        self.time = time

    def __repr__(self):
        description = time.ctime(self.time) + ' '
        if self.amount < 0:
            description += '-'
            description += '$' + str(abs(self.amount))
            return description
    def __self__(self, initial):
         self.balance = amount
 
while 1:
    print
    print
    print 'Welcome to the Bank"
    print '1. Deposite'
    print '2. Withdraw'
    print '3. Getbalance'
    print '9. Quit'
    print
    choice = int(raw_input('Enter your choice: '))

#   I added the exception line so that negartive
numbers woudl not be added.

    if choice == 1:
        amount = raw_input ('Amount: ')
    elif amount < 0:
        raise ValueError, 'Deposites must be positive'
    elif self.balance - amount < 0:
        raise ValueError, 'The account only holds $' +
str(self.balance)
        self._perform_transaction(-amount) 
        date = raw_input ('Date: ')
        numbers[amount] = date

# I added the exception line so that only positive
numbers woudl eb entered for withdraws. line so that 

    elif choice == 2:
        amount = raw_input ('Amount: ')
    if amount < 0:
        raise ValueError, 'Withdrawals must be
negative'
    elif self.balance - amount < 0:
        raise ValueError, 'The account only holds $' +
str(self.balance)
        self._perform_transaction(-amount)
        date = raw_input ('Date: ')
        numbers[amount] = date
        
    elif choice == 3:
        print
        for amount, date in numbers.items():
            print '%-20s : %-14s' % (amount, date)
    elif choice == 9:
        break
                
    else:
        print_menu()
        print "Goodbye"
        
##save numbers when done

s['numbers'] = numbers

s.close()

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