CSC111 Homework 10

For this assignment, I provide you with a main program, you provide the missing class definition. This assigment is due Thursday, 4/15/10 at 11:59 p.m. + 1 minute.

Problem #1: A list of students

""" 
hw10a.py
D. Thiebaut
 
A program with Classes and Objects.  You describe
the program here.
"""
 
text="""
111c-ca, Liz Cloud, xxyzzyK, lcloud@email.smith.edu
111c-cb, Fiona Poory, ahlhla, fpoory@email.smith.edu
111c-ck, Alex Doe, aluoiid, adoe@gmail.com
"""
 
def parseInput( text ):
    lines = text.split( "\n" )
    List = []
    for line in lines:
        words = line.split( ',' )
        if len( words )==4:
            (account, name, passw, email) = words
        List.append( (account, name, passw, email) )
 
def main():
    List = parseInput( text )
    print "List = ", List
 
main()

The program above takes a string of characters, text, splits it up into fields, and creates a list of tuples with 4 elements, where the first element is the account number of the student, the second her/his name, the fourth his/her password, and teh forth the email address.

The missing link

The program below assumes that the information relating to a student is stored in objects.

.
""" 
studentClass.py
D. Thiebaut
 
A program for the Exercises on Class/Objects
Creates a class to keep information about a student.
The class keeps track of the student's name, account number, 
password, and email address.
 
Object issued from this class have methods to
- print the student information (everything we know about a student)
- create a new student with all the information
- get the name of a student
- get the account number
- get the password
- get the email
- change the email address
"""
import os
 
#--------------------------------------------------------
# original list of students 
#--------------------------------------------------------
text="""
111c-ca, Liz Cloud, xxyzzyK, lcloud@email.smith.edu
111c-cb, Fiona Poory, ahlhla, fpoory@email.smith.edu
111c-ck, Alex Doe, aluoiid, alexDoe@email.smith.edu
"""
 
class Student:
 
     # missing code
     # all the methods of the class Student are missing
     # and it is your job to recreate them!
 
 
 
#--------------------------------------------------------
# parseInput: you are not allowed to change the
#                   code of this function
#--------------------------------------------------------
def parseInput( text ):
    """ parses the original text and creates a list of student objects"""
    lines = text.split( "\n" )
    List = []
    for line in lines:
        words = line.split( ',' )
        if len( words )==4:
            (account, name, passw, email) = words
            #--- create a new object and add it to the list of objects ---
            List.append( Student( account, name, passw, email ) )
    return List
 
#--------------------------------------------------------
# main
#--------------------------------------------------------
def main():
    """ creates a list of students, displays the list, changes the email
    address to reflect new change """
 
    #--- create a list of student objects---
    List = parseInput( text )
 
    #--- display the information for all the students in the list ---
    print "Original List"
    for stu in List:
        stu.printAll()  
 
    #--- Smith college decided to change its email address from "email.smith.edu" to 
    #--- "smithcollege.edu", so all the email addresses currently on record for students
    #--- have to change...
    #--- change all email addresses ---
    for stu in List:
        email = stu.getEmail().replace( "email.smith.edu", "smithcollege.edu" )
        stu.setEmail( email )
 
    #--- show the list again ---
    print "\n\nNew List after change of email address"
    for stu in List:
        stu.printAll() 
 
    #--- user Fiona Poory has changed her last name to Litmus... her record must be changed ---
    for stu in List:
        if stu.getName().find( "Fiona" )!= -1 and stu.getName().find( "Poory" )!=-1:
             stu.setName( "Fiona Litmus" )
             email = stu.getEmail()
             email = email.replace( "fpoory", "flitmus" )
             stu.setEmail( email )

    #--- show the list again ---
    print "\n\nNew List after change of name"
    for stu in List:
        stu.printAll() 

main()

.

The output of the program is shown below:

Original List
account: 111c-ca name:  Liz Cloud 	passw:  xxyzzyK	email:  lcloud@email.smith.edu
account: 111c-cb name:  Fiona Poory 	passw:  ahlhla	email:  fpoory@email.smith.edu
account: 111c-ck name:  Alex Doe 	passw:  aluoiid	email:  alexDoe@email.smith.edu


New List after change of email address
account: 111c-ca name:  Liz Cloud 	passw:  xxyzzyK	email:  lcloud@smithcollege.edu
account: 111c-cb name:  Fiona Poory 	passw:  ahlhla	email:  fpoory@smithcollege.edu
account: 111c-ck name:  Alex Doe 	passw:  aluoiid	email:  alexDoe@smithcollege.edu


New List after change of name
account: 111c-ca name:  Liz Cloud 	passw:  xxyzzyK	email:  lcloud@smithcollege.edu
account: 111c-cb name: Fiona Litmus 	passw:  ahlhla	email:  flitmus@smithcollege.edu
account: 111c-ck name:  Alex Doe 	passw:  aluoiid	email:  alexDoe@smithcollege.edu