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 __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.
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Publisher:James Kurose, Keith Ross
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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.
Transcribed Image Text:pickle.dump(account, fileObj)
fileObj.close()
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63 # Functions for testing
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65 def createBank (numAccounts =
1):
names = ("Brandon", "Molly", "Elena", "Mark", "Tricia",
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"Ken", "Jill", "Jack")
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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))
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return bank
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76 def testAccount():
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())
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90 def main(number = 10, fileName = None):
testAccount ()
if fileName:
bank = Bank (fileName)
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92 ##
93 ##
94 ##
else:
bank = createBank (number)
print(bank)
95 ##
96 ##
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98 if --name_-
main()
'-_main__":
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O co
![bank.py
savingsaccount.py
2 File: bank.py
3 Project 9.3
4 The str for Bank returns a string of accounts sorted by name.
5 II II|
6 import pickle
7 import random
8 from savingsaccount import SavingsAccount
10 class Bank:
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def --init__(self, fileName = None):
self.accounts = {}
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self.fileName = fileName
if fileName != None:
fileObj = open(fileName, 'rb')
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while True:
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try:
account = pickle.load(fileObj)
self.add(account)
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except Exception:
fileObj.close()
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break
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def --str__(self):
# TODO: Sort the account values before printing to the screen
return "\n".join(map(str, self.accounts.values()))
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def makekey(self, name, pin):
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return name + "/" + pin
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def add(self, account):
key = self.makekey(account.getName (), account.getPin(O)
self.accounts[key] = account
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def remove (self, name, pin):
key = self.makekey(name, pin)
return self.accounts.pop(key, None)
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def get(self, name, pin):
key = self.makeKey(name, pin)
return self.accounts. get(key, None)
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def computeInterest(self):
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total = 0
for account in self._accounts.values():
total += account.computeInterest ()
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return total
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def getKeys(self):
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return []
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def save(self, fileName = None):
if fileName != None:
self.fileName = fileName
elif self.fileName == None:
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return
fileObj = open(self.fileName, 'wb')
for account in self.accounts.values ():
pickle.dump(account, fileObj)
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60](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7d60e72e-16b0-49e3-ab86-94339099b7a5%2F7b9f2d84-9e0a-43f2-81bf-3d1862f3d526%2Fqjls5_processed.png&w=3840&q=75)
Transcribed Image Text:bank.py
savingsaccount.py
2 File: bank.py
3 Project 9.3
4 The str for Bank returns a string of accounts sorted by name.
5 II II|
6 import pickle
7 import random
8 from savingsaccount import SavingsAccount
10 class Bank:
11
def --init__(self, fileName = None):
self.accounts = {}
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self.fileName = fileName
if fileName != None:
fileObj = open(fileName, 'rb')
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while True:
18
try:
account = pickle.load(fileObj)
self.add(account)
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except Exception:
fileObj.close()
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break
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def --str__(self):
# TODO: Sort the account values before printing to the screen
return "\n".join(map(str, self.accounts.values()))
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def makekey(self, name, pin):
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return name + "/" + pin
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def add(self, account):
key = self.makekey(account.getName (), account.getPin(O)
self.accounts[key] = account
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def remove (self, name, pin):
key = self.makekey(name, pin)
return self.accounts.pop(key, None)
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def get(self, name, pin):
key = self.makeKey(name, pin)
return self.accounts. get(key, None)
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def computeInterest(self):
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total = 0
for account in self._accounts.values():
total += account.computeInterest ()
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return total
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def getKeys(self):
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return []
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def save(self, fileName = None):
if fileName != None:
self.fileName = fileName
elif self.fileName == None:
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57
return
fileObj = open(self.fileName, 'wb')
for account in self.accounts.values ():
pickle.dump(account, fileObj)
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