The __str__ method of the Bank class (in bank.py) returns a string containing the accounts in random order. Design and implement a change that causes the accounts to be placed in the string in ascending order of name. Implement the __str__ method of the bank class so that it sorts the account values before printing them to the console. In order to sort the account values you will need to define the __eq__ and __lt__ methods in the SavingsAccount class (in savingsaccount.py). The __eq__ method should return True if the account names are equal during a comparison, False otherwise. The __lt__ method should return True if the name of one account is less than the name of another, False otherwise. The program should output in the following format: Test for createBank: Name: Jack PIN: 1001 Balance: 653.0 Name: Mark PIN: 1000 Balance: 377.0 ... ... ... Name: Name7 PIN: 1006 Balance: 100.0
The __str__ method of the Bank class (in bank.py) returns a string containing the accounts in random order. Design and implement a change that causes the accounts to be placed in the string in ascending order of name. Implement the __str__ method of the bank class so that it sorts the account values before printing them to the console. In order to sort the account values you will need to define the __eq__ and __lt__ methods in the SavingsAccount class (in savingsaccount.py). The __eq__ method should return True if the account names are equal during a comparison, False otherwise. The __lt__ method should return True if the name of one account is less than the name of another, False otherwise. The program should output in the following format: Test for createBank: Name: Jack PIN: 1001 Balance: 653.0 Name: Mark PIN: 1000 Balance: 377.0 ... ... ... Name: Name7 PIN: 1006 Balance: 100.0
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The __str__ method of the Bank class (in bank.py) returns a string containing the accounts in random order. Design and implement a change that causes the accounts to be placed in the string in ascending order of name.
Implement the __str__ method of the bank class so that it sorts the account values before printing them to the console.
In order to sort the account values you will need to define the __eq__ and __lt__ methods in the SavingsAccount class (in savingsaccount.py).
The __eq__ method should return True if the account names are equal during a comparison, False otherwise.
The __lt__ method should return True if the name of one account is less than the name of another, False otherwise.
The program should output in the following format:
Test for createBank: Name: Jack PIN: 1001 Balance: 653.0 Name: Mark PIN: 1000 Balance: 377.0 ... ... ... Name: Name7 PIN: 1006 Balance: 100.0
bank.py
"""
File: bank.py
Project 9.3
The str for Bank returns a string of accounts sorted by name.
"""
import pickle
import random
from savingsaccount import SavingsAccount
class Bank:
"""This class represents a bank as a collection of savings accounts.
An optional file name is also associated
with the bank, to allow transfer of accounts to and
from permanent file storage."""
"""The state of the bank is a dictionary of accounts and a file name. If the file name is None, a file name for the bank has not yet been established."""
def __init__(self, fileName = None):
"""Creates a new dictionary to hold the accounts.
If a file name is provided, loads the accounts from
a file of pickled accounts."""
self.accounts = {}
self.fileName = fileName
if fileName != None:
fileObj = open(fileName, 'rb')
while True:
try:
account = pickle.load(fileObj)
self.add(account)
except Exception:
fileObj.close()
break
def __str__(self):
"""Returns the string representation of the bank."""
nameSort = sorted(self.accounts)
return "\n".join(map(str, nameSort))
def makeKey(self, name, pin):
"""Returns a key for the account."""
return name + "/" + pin
def add(self, account):
"""Adds the account to the bank."""
key = self.makeKey(account.getName(), account.getPin())
self.accounts[key] = account
def remove(self, name, pin):
"""Removes the account from the bank and
and returns it, or None if the account does
not exist."""
key = self.makeKey(name, pin)
return self.accounts.pop(key, None)
def get(self, name, pin):
"""Returns the account from the bank,
or returns None if the account does
not exist."""
key = self.makeKey(name, pin)
return self.accounts.get(key, None)
def computeInterest(self):
"""Computes and returns the interest on
all accounts."""
total = 0
for account in self._accounts.values():
total += account.computeInterest()
return total
def getKeys(self):
"""Returns a sorted list of keys."""
return []
def save(self, fileName = None):
"""Saves pickled accounts to a file. The parameter
allows the user to change file names."""
if fileName != None:
self.fileName = fileName
elif self.fileName == None:
return
fileObj = open(self.fileName, 'wb')
for account in self.accounts.values():
pickle.dump(account, fileObj)
fileObj.close()
# Functions for testing
def createBank(numAccounts = 1):
"""Returns a new bank with the given number of
accounts."""
names = ("Brandon", "Molly", "Elena", "Mark", "Tricia",
"Ken", "Jill", "Jack")
bank = Bank()
upperPin = numAccounts + 1000
for pinNumber in range(1000, upperPin):
name = random.choice(names)
balance = float(random.randint(100, 1000))
bank.add(SavingsAccount(name, str(pinNumber), balance))
return bank
def testAccount():
"""Test function for savings account."""
account = SavingsAccount("Ken", "1000", 500.00)
print(account)
print(account.deposit(100))
print("Expect 600:", account.getBalance())
print(account.deposit(-50))
print("Expect 600:", account.getBalance())
print(account.withdraw(100))
print("Expect 500:", account.getBalance())
print(account.withdraw(-50))
print("Expect 500:", account.getBalance())
print(account.withdraw(100000))
print("Expect 500:", account.getBalance())
def main(number = 10, fileName = None):
"""Creates and prints a bank, either from
the optional file name argument or from the optional
number."""
if fileName:
bank = Bank(fileName)
else:
bank = createBank(number)
print(bank)
if __name__ == "__main__":
main()
I am just about to the character limit on this question so the other file will be in images.
Transcribed Image Text:```python
"""
File: savingsaccount.py
This module defines the SavingsAccount class.
"""
class SavingsAccount:
"""This class represents a savings account
with the owner's name, PIN, and balance."""
RATE = 0.02 # Single rate for all accounts
def __init__(self, name, pin, balance = 0.0):
self.name = name
self.pin = pin
self.balance = balance
def __str__(self):
"""Returns the string rep."""
result = 'Name: ' + self.name + '\n'
result += 'PIN: ' + self.pin + '\n'
result += 'Balance: ' + str(self.balance)
return result
def getBalance(self):
"""Returns the current balance."""
return self.balance
def getName(self):
"""Returns the current name."""
return self.name
def getPin(self):
"""Returns the current pin."""
return self.pin
def deposit(self, amount):
"""If the amount is valid, adds it
to the balance and returns None;
otherwise, returns an error message."""
self.balance += amount
return None
def withdraw(self, amount):
"""If the amount is valid, subtract it
from the balance and returns None;
otherwise, returns an error message."""
if amount < 0:
return "Amount must be >= 0"
elif self.balance < amount:
return "Insufficient funds"
else:
self.balance -= amount
return None
def computeInterest(self):
"""Computes, deposits, and returns the interest."""
interest = self.balance * SavingsAccount.RATE
self.deposit(interest)
return interest
def __eq__(self, other):
"""Returns True if names are equal or False otherwise."""
returnValue = False
if isinstance(other, savingsaccount):
if self.name == other.name:
returnValue = True
return returnValue
def __lt__(self, other):
"""Returns True if name of self is less than
the name of other, or False otherwise."""
returnValue = False
if isinstance(other, savingsaccount):
if self.name < other.name:
returnValue = True
return returnValue
```
### Explanation
This Python script defines a class named `
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