psyco problem

import psyco
psyco.full()

class Account:
	def __init__(self):
		self.balance = 0
	def Withdraw(self, amount):
		self.balance-=amount
	def Deposit(self, amount):
		self.balance+= amount
	def GetBalance(self):
		return self.balance
	
class Bank:
	def __init__(self):
		self.accounts = {}
		print 'Congratulations! You have created a new bank'
		accountsQty=input('Please enter number of accounts in bank: ')
		for i in range(accountsQty):
			self.accounts[i]=Account()
	def Deposit(self):
                print 'DEPOSIT'
		amount= input('Please enter amount to deposit: ')
		accountNr= input('Enter account number: ')
		self.accounts[accountNr - 1].Deposit(amount)
		print 'New balance of account', accountNr,':', self.accounts[accountNr -1].GetBalance()
	def Withdraw(self):
                print 'WITHDRAW'
		amount= input('Please enter amount to withdraw: ')
		accountNr= input('Enter account number: ')
		self.accounts[accountNr - 1].Withdraw(amount)
		print 'New balance of account Nr. %s: %s' %(accountNr, self.accounts[accountNr -1].GetBalance())
	def Trans(self):
                print 'TRANSFER'
		account1= input('Enter account of origin: ')
		account2= input('Enter destination account: ')
		amount= input('Enter amount to transfer: ')
		self.accounts[account1-1].Withdraw(amount)
		self.accounts[account2-1].Deposit(amount)
		print '%s transfered from account Nr. %s to account Nr. %s' %(amount, account1, account2)
	def PrintAllBalances(self):
		print 'Account balances for all accounts'
		for i in self.accounts.keys():
			print 'Account Nr. %s :\t%s' %((i+1), self.accounts[i].GetBalance())



def PrintMenu():
    print ''
    print 'What would you like to do?'
    print 'D)eposit'
    print 'W)ithdraw'
    print 'T)ransfer'
    print 'P)rint all balances'
    print 'E)nd session'
    print ''


bigBucksBank= Bank()
command=1
while (command != 'E'):
    PrintMenu()
    command= raw_input()
    command= command.upper()
        
    if command=='D':
        bigBucksBank.Deposit()
    elif command=='W':
        bigBucksBank.Withdraw()
    elif command=='T':
        bigBucksBank.Trans()
    elif command=='P':
        bigBucksBank.PrintAllBalances()
    elif command=='E':
        exit()
    else:
        print 'Invalid choice'