class BankSystem:

def $\_\_$init$\_\_($self$)$:

self.balance $=0$

self.is$\_$logged$\_$in $=$ False

def login$($self$,$ password$)$:

if password $==\text{'}1234\text{'}$:

self.is$\_$logged$\_$in $=$ True

print$("$Login successful."$)$

else:

print$("$Incorrect password."$)$

def logout$($self$)$:

self.is$\_$logged$\_$in $=$ False

print$("$Logged out."$)$

def deposit$($self$,$ amount$)$:

if self.is$\_$logged$\_$in:

self.balance $+=$ amount

print$($f$"$Deposited $\backslash$$ $\{$amount$\}.$ New balance is $\backslash$$ $\{$self$.$balance$\}.")$

else:

print$("$Please login first."$)$

def withdraw$($self$,$ amount$)$:

if self.is$\_$logged$\_$in:

if amount $<=$ self.balance:

self.balance $-=$ amount

print$($f$"$Withdrew $\backslash$$ $\{$amount$\}.$ New balance is $\backslash$$ $\{$self$.$balance$\}.")$

else:

print$("$Insufficient balance."$)$

else:

print$("$Please login first."$)$

bank $=$ BankSystem$()$

bank.login$(\text{'}1234\text{'})$

bank.deposit$(1000)$

bank.withdraw$(500)$

bank.logout$()$ draw graph for that code