Chapter 9 : Introduction to Data Structures

Example 9.1, Page No 205

class employee:
    def __init__(self,fname,lname,id1,salary):
        self.fname = fname
        self.lname = lname
        self.id1 = id1
        self.salary = salary
if __name__ == '__main__':
    emp1 = employee("Michael","Vine",123,50000.00)
    print "\n First name: " + emp1.fname + "\n"
    print "Last name: " + emp1.lname + "\n"
    print "Employee ID: " + str(emp1.id1) + "\n"
    print "Salary: " + str(emp1.salary) + "\n"

 First name: Michael

Last name: Vine

Employee ID: 123

Salary: 50000.0

Example 9.2, Page No 206

class employee:
    def __init__(self,fname,lname,id1,salary):
        self.fname = fname
        self.lname = lname
        self.id1 = id1
        self.salary = salary
if __name__ == '__main__':
    emp1 = employee("Michael","Vine",123,50000.00)
    print "\n First name: " + emp1.fname + "\n"
    print "Last name: " + emp1.lname + "\n"
    print "Employee ID: " + str(emp1.id1) + "\n"
    print "Salary: " + str(emp1.salary) + "\n"

 First name: Michael

Last name: Vine

Employee ID: 123

Salary: 50000.0

Example 9.3, Page No 209

class scores:
    def __init__(self,name,score):
        self.name = name
        self.score = score
if __name__ == '__main__':
    highScores = []
    highScores.append(scores("Hunter",40768))
    highScores.append(scores("Kenya",38568))
    highScores.append(scores("Apollo",35985))
    for x in range(3):
        print "\n" + highScores[x].name + "\t" + str(highScores[x].score) + "\n"

Hunter	40768


Kenya	38568


Apollo	35985

Example 9.4, Page No 211

class employee:
    def __init__(self,id1,name,salary):
        self.id1 = id1
        self.name = name
        self.salary = salary
def processEmp(emp1):
    emp1.id1 = 123
    emp1.name = "Sheila"
    emp1.salary = 65000.00
if __name__ == '__main__':
    emp1 = employee(0,0,0)
    processEmp(emp1)
    print "\n Id : " + str(emp1.id1) + "\n"
    print "Name : " + emp1.name + "\n"
    print "Salary : " + str(emp1.salary) + "\n"

 Id : 123

Name : Sheila

Salary : 65000.0

Example 9.5, Page No 212

class player:
    def __init__(self,name,score):
        self.name = name
        self.score = score
if __name__ == '__main__':
    aPlayer = player(0,0)
    ptrPlayer = id(aPlayer)
    aPlayer.name = "Pinball Wizard"
    aPlayer.score = 1000000.00
    print "\nPlayer : " + aPlayer.name + "\n"
    print "Score : " + str(aPlayer.score)

Player : Pinball Wizard

Score : 1000000.0

Example 9.6, Page No 213

class employee:
    def __init__(self,id1,name,salary):
        self.id1 = id1
        self.name = name
        self.salary = salary
def processEmp(emp1):
    emp1.id1 = 123
    emp1.name = "Sheila"
    emp1.salary = 65000.00
if __name__ == '__main__':
    emp1 = employee(0,0,0)
    ptrEmp = id(emp1)
    processEmp(emp1)
    print "\nId : " + str(emp1.id1) + "\n"
    print "Name : " + emp1.name + "\n"
    print "Salary : " + str(emp1.salary) + "\n"

Id : 123

Name : Sheila

Salary : 65000.0

Example 9.7, Page No 215

class employee:
    def __init__(self,id1,name,salary):
        self.id1 = id1
        self.name = name
        self.salary = salary
def processEmp(emp1 = []):
    emp1.append(employee(123,"Sheila",65000.00))
    emp1.append(employee(234,"Hunter",28000.00))
    emp1.append(employee(456,"Kenya",48000.00))
    return emp1
if __name__ == '__main__':
    emp1 = []
    emp1 = employee(0,0,0)
    emp1 = processEmp(emp1 = [])
    for x in range(3):
        print "\nId : " + str(emp1[x].id1) + "\n" 
        print "Name : " + emp1[x].name + "\n"
        print "Salary : " + str(emp1[x].salary)

Id : 123

Name : Sheila

Salary : 65000.0

Id : 234

Name : Hunter

Salary : 28000.0

Id : 456

Name : Kenya

Salary : 48000.0

Example 9.8, Page No 217

class phonebook:
    def __init__(self,name,number,address):
        self.name = name
        self.number = number
        self.address = address
class magazine:
    def __init__(self,name,author,isbn):
        self.name = name
        self.author = author
        self.isbn = isbn
if __name__ == '__main__':
    aBook = phonebook("John",123,"John Smith")
    aMagazine = magazine("C Programming","Michael Vine",1-59863-480-1)
    print "\nUnion Details\n"
    print "Address for aBook.name: " +  str(id(aBook.name)) + "\n"
    print "Address for aBook.number: ", str(id(aBook.number)) + "\n"
    print "Address for aBook.address: ", str(id(aBook.address)) + "\n"
    print "\nStructure Details\n"
    print "Address for aMagazine.name: ", str(id(aMagazine.name)) + "\n"
    print "Address for aMagazine.author: ", str(id(aMagazine.author)) + "\n"
    print "Address for aMagazine.isbn: ", str(id(aMagazine.isbn)) + "\n"

 
Union Details

Address for aBook.name: 66178424

Address for aBook.number:  30796656

Address for aBook.address:  66151792


Structure Details

Address for aMagazine.name:  66151744

Address for aMagazine.author:  66150976

Address for aMagazine.isbn:  64689272

Example 9.9, Page No 219

x = 12
y = 5
print "\nWithout Type-Casting\n"
print "12 \\ 5 = " + str(x/y) + "\n"
print "\nWith Type-Casting\n"
print "12 \\ 5 = " + str(float(x)/float(y)) + "\n"

Without Type-Casting

12 \ 5 = 2


With Type-Casting

12 \ 5 = 2.4

Example 9.10, Page No 220

number = 86
letter = 'M'
print "\n86 type-casted to char is: " + chr(number) + "\n"
print "\n'M' type-casted to int is: " + str(ord(letter)) + "\n "

86 type-casted to char is: V


'M' type-casted to int is: 77
 

Example 9.11, Page No 222

# This program is not possible in python.