import sys
def isNumber(s):
try:
float(s)
return True
except ValueError:
return False
try:
fileIn = open('datafile2.dat', 'r')
clientDT=['Name','Address','Balance']
clientDL=[]
line = fileIn.readline()
while line != '':
clientRec=line.split('_')
if len(clientRec) < 4:
sys.stderr.write('Missing data : '+line+'\n')
elif clientRec[0] == '' or clientRec[1] == '':
sys.stderr.write('Invalid Name or Address : '+line+'\n')
elif clientRec[2] != 'D' and clientRec[2] != 'C':
sys.stderr.write('Invalid transaction code : '+line+'\n')
elif not isNumber(clientRec[3]):
sys.stderr.write('Transaction amt not number : '+line+'\n')
elif float(clientRec[3]) < 0 or float(clientRec[3]) > 10000000 :
sys.stderr.write('Invalid transaction amt : '+line+'\n')
else:
if len(clientDL) == 0:
if clientRec[2] == 'D':
clientDL.append(dict(zip(clientDT,
[clientRec[0],clientRec[1],float(clientRec[3])])))
else:
clientDL.append(dict(zip(clientDT,
[clientRec[0],clientRec[1],-float(clientRec[3])])))
else:
i = 0
while i < len(clientDL) and clientDL[i]['Name'] != clientRec[0]:
i += 1
if i == len(clientDL):
if clientRec[2] == 'D':
clientDL.append(dict(zip(clientDT,
[clientRec[0],clientRec[1],float(clientRec[3])])))
else:
clientDL.append(dict(zip(clientDT,
[clientRec[0],clientRec[1],-float(clientRec[3])])))
else:
if clientRec[2] == 'D':
clientDL[i]['Balance'] += float(clientRec[3])
else: clientDL[i]['Balance'] -= float(clientRec[3])
line = fileIn.readline()
if len(clientDL) == 0:
sys.stderr.write('empty or invalid data only : '+line+'\n')
else:
print('%-20s%-30s%10s'%(clientDT[0],clientDT[1],clientDT[2]))
print('='*60)
for e in sorted(clientDL, key = lambda c: c['Name']):
if e['Balance'] != 0:
print('%-20s%-30s%10.2f'%(e['Name'],e['Address'],e['Balance']))
fileIn.close()
except FileNotFoundError as error:
sys.stderr.write(str(error)+'\n')
class Client(object):
'''
Client class to represent each customer object
'''
numClient = 0 # class variable to record number of client
def __init__(self, dataLine ):
'''
constructor method
Parameters:
- dataLine with following data feilds
- name: name of customer
- address: name of customer
- transsaction code (not an attribute)
- balance: balance of customer
'''
clientRec=dataLine.split('_')
if len(clientRec) < 4:
raise ValueError('Missing data : ')
elif clientRec[0] == '' or clientRec[1] == '':
raise ValueError('Invalid Name or Address :')
elif clientRec[2] != 'D' and clientRec[2] != 'C':
raise ValueError('Invalid transaction code :')
elif float(clientRec[3]) < 0 or float(clientRec[3]) > 10000000 :
raise ValueError('Invalid transaction amt :')
Client.numClient += 1
self.name = clientRec[0]
self.address = clientRec[1]
if clientRec[2] == 'D':
self.__balance = float(clientRec[3])
else:
self.__balance = -float(clientRec[3])
def debit(self,amount):
'''
debit method to increase balance of liability account
Parameters:
- amount: amount to bebit
'''
self.__balance += amount
def credit(self,amount):
'''
credit method to increase balance of liability account
Parameters:
- amount: amount to credit
'''
self.__balance -= amount
def getBalance(self):
'''
accessor method to get balance
'''
return self.__balance
def __str__(self):
'''
String representation of client object
'''
return '%-20s%-30s%10.2f'%\
(self.name,self.address,self.__balance)
import sys
from Client import Client
try:
fileIn = open('datafile6.dat', 'r')
clientDT=['Name','Address','Balance']
clientDL=[]
line = fileIn.readline()
while line != '':
clientRec=line.split('_')
try:
if Client.numClient == 0:
clientDL.append(Client(line))
else:
i = 0
while i < Client.numClient and clientDL[i].name != clientRec[0]:
i += 1
if i == Client.numClient:
clientDL.append(Client(line))
elif clientRec[2] != 'D' and clientRec[2] != 'C':
raise ValueError('Invalid transaction code :')
else:
if clientRec[2] == 'D':
clientDL[i].debit(float(clientRec[3]))
else: clientDL[i].credit(float(clientRec[3]))
except ValueError as valueError:
sys.stderr.write(str(valueError) + ' ' + line + '\n')
line = fileIn.readline()
if Client.numClient == 0:
sys.stderr.write('empty or invalid data only : '+line+'\n')
else:
sys.stdout.flush()
print('%-20s%-30s%10s'%(clientDT[0],clientDT[1],clientDT[2]))
print('='*60)
for e in sorted(clientDL, key = lambda c: c.name):
if e.getBalance() != 0:
print(e)
fileIn.close()
except FileNotFoundError as e:
sys.stderr.write(str(e))
| Test Report | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Test data | Expected Output | Pass | |||||||||||||||||||||
| 1 | Fred Chan_213 Yuen Long Avenue_D_41.03 Sue Wong_9102 Kowloon Circle_D_10.00 Fred Chan_213 Yuen Long Avenue_C_0.01 Baba Li_2000 E. 21st Street_D_450.00 Sue Wong_9102 Kowloon Circle_C_5.50 Jay Law_9103 Problem Area_C_25.00 Fred Chan_213 Yuen Long Avenue_C_41.02 |
| Yes | |||||||||||||||||||||
| 2 | file not exist | No such file or directory: 'datafileo.dat' | yes | |||||||||||||||||||||
| 3 | empty data file | empty or invalid data only | yes | |||||||||||||||||||||
| 4 | Fred Chan_213 Yuen Long Avenue_D_41.03 Sue Wong_9102 Kowloon Circle_D_10.00 _213 Yuen Long Avenue_C_0.01 Baba Li__D_450.00 Sue Wong_9102 Kowloon Circle_C_5.50 Jay Law_9103 Problem Area_C_25.00 Fred Chan_213 Yuen Long Avenue_C_41.02 | Invalid Name or Address : _213 Yuen Long Avenue_C_0.01 Invalid Name or Address : Baba Li__D_450.00
| Yes | |||||||||||||||||||||
| 5 | Fred Chan_213 Yuen Long Avenue_D_41.03 Sue Wong_9102 Kowloon Circle_D_10.00 Fred Chan_213 Yuen Long Avenue_C_0.01 Baba Li_2000 E. 21st Street_X_450.00 Sue Wong_9102 Kowloon Circle_X_5.50 Jay Law_9103 Problem Area_C_25.00 Fred Chan_213 Yuen Long Avenue_C_41.02 | Invalid transaction code : Baba Li_2000 E. 21st Street_X_450.00 Invalid transaction code : Sue Wong_9102 Kowloon Circle_X_5.50
| Yes | |||||||||||||||||||||
| 6 | Fred Chan_213 Yuen Long Avenue_D_-41.03 Sue Wong_9102 Kowloon Circle_D_10.00 Fred Chan_213 Yuen Long Avenue_C_0.01 Baba Li_2000 E. 21st Street_D_450.00 Sue Wong_9102 Kowloon Circle_C_5.50 Jay Law_9103 Problem Area_C_25.00 Fred chan_213 Yuen Long Avenue_C_41.02 | Invalid transaction amt : Fred Chan_213 Yuen Long Avenue_D_-41.03
| Yes | |||||||||||||||||||||
| 7 | Fred Chan_213 Yuen Long Avenue_D_41.03 Sue Wong_9102 Kowloon Circle_D_10.00 Fred Chan_213 Yuen Long Avenue_C_0.01 Baba Li_2000 E. 21st Street_D_9999999999999999999999999 Sue Wong_9102 Kowloon Circle_C_5.50 Jay Law_9103 Problem Area_C_25.. Fred Chan_213 Yuen Long Avenue_C_41.02 | Invalid transaction amt : Baba Li_2000 E. 21st Street_D_9999999999999999999999999 Transaction amt not number : Jay Law_9103 Problem Area_C_25..
| Yes | |||||||||||||||||||||
import doctest
def isPalindrome(s):
'''
return if s is a palindrome
>>> isPalindrome('')
True
>>> isPalindrome('a')
True
>>> isPalindrome('aa')
True
>>> isPalindrome('aba')
True
>>> isPalindrome('abba')
True
>>> isPalindrome('ababa')
True
>>> isPalindrome('ababb')
False
>>> isPalindrome('abab')
False
>>> isPalindrome('abc')
False
>>> isPalindrome('ab')
False
'''
if len(s) <= 1:
return True
else:
return bool(s[0] == s[len(s)-1] and isPalindrome(s[1:len(s)-1]))
if __name__ == "__main__":
doctest.testmod()
import unittest
from lab5q2 import isPalindrome
class Test(unittest.TestCase):
def testPalindrome(self):
self.assertTrue(isPalindrome(''))
self.assertTrue(isPalindrome('a'))
self.assertTrue(isPalindrome('aa'))
self.assertTrue(isPalindrome('aba'))
self.assertTrue(isPalindrome('abababa'))
self.assertTrue(isPalindrome('able was i ele i saw elba'))
def testNotaPalindrome(self):
self.assertFalse(isPalindrome('ab'))
self.assertFalse(isPalindrome('abc'))
self.assertFalse(isPalindrome('abaa'))
self.assertFalse(isPalindrome('aaaaaaaaaaaaaaaaaaaaaaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaaa'))
if __name__ == "__main__":
unittest.main()
import sys
def readFloat(s,inputType):
while True:
try:
inputValue=float(input(s))
if inputType == 1:
if inputValue < 1000 or inputValue > 100000:
raise ValueError('invalid loan amount')
elif inputType == 2:
if inputValue < 0.1 or inputValue > 100:
raise ValueError('invalid interest rate')
return inputValue
except ValueError as error:
sys.stderr.write(str(error)+'\n')
def main():
try:
loanAmount = readFloat("The loan amount is (1000 - 10000): ",1)
annualInterestRate = readFloat("The annual interest rate is (0.1 - 100): ",2)
monthlyPayment = readFloat("The monthly payment is (in less than 100 payment): ",3)
month = 1;
startingBalance = loanAmount;
payment = monthlyPayment;
middleBalance = loanAmount - payment;
interest = middleBalance * annualInterestRate/12/100;
endingBalance = middleBalance + interest;
while startingBalance > 0:
month+=1
if month > 100:
raise ValueError('payment number > 100 ')
startingBalance = endingBalance
if endingBalance > monthlyPayment:
payment = monthlyPayment
else: payment = endingBalance
middleBalance = startingBalance - payment
interest = middleBalance * annualInterestRate/12/100
endingBalance = middleBalance + interest
month = 1;
startingBalance = loanAmount;
payment = monthlyPayment;
middleBalance = loanAmount - payment;
interest = middleBalance * annualInterestRate/12/100;
endingBalance = middleBalance + interest;
print("\n")
print("%25s%30s%30s"%
("Starting","Middle","Ending"))
print("%10s%15s%15s%15s%15s%15s"%
("Month","Balance","Payment","Balance","Interest","Balance"))
print("-"*85)
while startingBalance > 0:
print("%10d%15.2f%15.2f%15.2f%15.2f%15.2f"%
(month,startingBalance,payment,middleBalance,interest,endingBalance))
month+=1
startingBalance = endingBalance
if endingBalance > monthlyPayment:
payment = monthlyPayment
else: payment = endingBalance
middleBalance = startingBalance - payment
interest = middleBalance * annualInterestRate/12/100
endingBalance = middleBalance + interest
except ValueError as error:
sys.stderr.write(str(error)+'\n')
if __name__ == "__main__":
main()
import sys
import currencyAPI
instructions = """Enter one of the following:
1 to reads the contents of a URL in XML
2 to to print XML data in JSON format
3 to to print forex rate table
4 to fetch a currency rate
5 to end \n"""
while True:
print (instructions)
choice = input( "Enter 1 to 5 " )
if choice == "1":
url='http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml'
dictionary=currencyAPI.readXMLUrl(url)
elif choice == "2":
currencyAPI.printDictJson(dictionary)
elif choice == "3":
currencyAPI.printCurrencyList(dictionary)
elif choice == "4":
userCurrency = input('Enter Currency Code : ')
if userCurrency == 'XDR':
currencyFound = True
else: currencyFound = False
for e in dictionary['gesmes:Envelope']['Cube']['Cube']['Cube']:
if e.get('@currency') == userCurrency:
currencyFound = True
break
if currencyFound:
print("On %15s One euro is %15s"% currencyAPI.getCurrencyData(dictionary, userCurrency))
else:
sys.stderr.write('invalid currency code')
elif choice == "5":
break
print ("End currencyAPI test")