CSC111 Lab 10 Solution Programs 2014
--D. Thiebaut (talk) 10:09, 8 April 2014 (EDT)
# Lab 10 solution programs
# D. Thiebaut
#
text = """
Alex, 20, 3.6, ART
Lulu, 21, 3.5, BIO
Alka, 19, 3.0, ENG
Le, 21, 3.2, EGR
"""
SWsFriends = [
# name pocket-money debt
("Sleepy", 10, "NA" ),
("Sneezy", 25.50, 0 ),
("Bashful", 0.50, 10.51 ),
( "Happy", 0, 0 ),
( "Grumpy", 0, 100.30 ),
( "Dopey", "NA", 0 ),
( "Doc", 200, 0 ) ]
def main0():
# display everybody's status
for name, pocket, debt in SWsFriends:
print( name, "has", pocket, "dollar(s) in his pocket, and owes",
debt, "dollar(s)" )
# compute sum in pockets
print( "\n\n" )
sumPocket = 0
for name, pocket, debt in SWsFriends:
try:
sumPocket += pocket
except TypeError as err:
print( "*** Error ***:", err.args[0] )
print( "Total in pocket = ", sumPocket )
# compute total debt
print( "\n\n" )
totalDebt = 0
for name, pocket, debt in SWsFriends:
try:
totalDebt += debt
except TypeError as err:
print( "*** Error ***:", err.args[0] )
print( "Total debt = ", totalDebt )
# nicely formatted output
print( "\n\n" )
for name, pocket, debt in SWsFriends:
try:
pocketStr = "%7.2f" % float( pocket )
except ValueError as err:
#print( "*** Error ***:", err.args[0] )
pocketStr = "%7s" % "NA"
try:
debtStr = "%7.2f" % float( debt )
except ValueError as err:
#print( "*** Error ***:", err.args[0] )
debtStr = "%7s" % "NA"
print( "%10s %s %s" % ( name, pocketStr, debtStr ) )
# ================================================================
# ____
#| _ \ ___ _ __ ___ ___ _ __
#| |_) / _ \ '__/ __|/ _ \| '_ \
#| __/ __/ | \__ \ (_) | | | |
#|_| \___|_| |___/\___/|_| |_|
#
class Person:
# a class containing 4 fields:
# - name of the person (string)
# - age (integer)
# - gpa (float)
# - major (string, uppercase)
# constructor: intializes a person with all fields
def __init__(self, n, a, g, m):
self._name = n
self._age = a
self._gpa = g
self._major= m
# returns a string with the name and age.
def toString( self ):
return "\t%s\t\t%d" % ( self._name, self._age )
# returns the name
def getName( self ):
return self._name
# set the age to a new value x
def setAge( self, x ):
self._age = x
# returns the age of the person
def getAge( self ):
return self._age
# ================================================================
# ____
#| _ \ ___ __ _
#| | | |/ _ \ / _` |
#| |_| | (_) | (_| |
#|____/ \___/ \__, |
# |___/
#
class Dog:
def __init__(self, tn, a, v, b ):
self._tagName = tn
self._age = a
self._vaccinated = v
self._breed = b
def toString( self ):
vacc = "vaccinated"
if not self._vaccinated:
vacc = "not " + vacc
return "%s, %d years old, %s, %s" % (
self._tagName,
self._age,
vacc,
self._breed )
def isVaccinated( self ):
return self._vaccinated
def getBreed( self ):
return self._breed
# ================================================================
# ____ _ _ _ _ _
#| _ \| | __ _ _ __ ___| |_| | (_)___| |_
#| |_) | |/ _` | '_ \ / _ \ __| | | / __| __|
#| __/| | (_| | | | | __/ |_| |___| \__ \ |_
#|_| |_|\__,_|_| |_|\___|\__|_____|_|___/\__|
#
class PlanetList:
def __init__( self ):
self._list = [("Earth", 12756 ),
("Venus", 12104 ),
("Mercury", 4880 ),
("Moon", 3476 ) ]
def toString( self ):
justNames = [ name for name,diameter in self._list ]
return ", ".join( justNames )
def addNewPlanetFromInput( self ):
name = input( "What is the name of the new planet? " )
name = name.strip().capitalize()
justNames = [ name for name,diameter in self._list ]
if name in justNames:
print( "This planet is alread in the list!" )
return
diameter = int( input( "What is the diameter of this planet? " ) )
self._list.append( (name, diameter) )
def noOfPlanets( self ):
return len( self._list )
def isEmpty( self ):
return len( self._list )==0
def smallest( self ):
if self.noOfPlanets() == 0:
return None
listOrderedBySize = [ (diam, name) for name, diam in self._list ]
listOrderedBySize.sort()
# return the name (2nd argument) of the first in list
return listOrderedBySize[0][1]
def largest( self ):
if self.noOfPlanets() == 0:
return None
listOrderedBySize = [ (diam, name) for name, diam in self._list ]
listOrderedBySize.sort()
listOrderedBySize.reverse()
# return the name (2nd argument) of the first in list
return listOrderedBySize[0][1]
# =================================================================
def playWithPeople():
# create a list of people taken from the text
people = []
for line in text.split( "\n" ):
words = line.split( "," )
# skip ill-formed lines
if len( words ) != 4:
continue
# strip each word
words = [ w.strip() for w in words ]
person = Person( words[0], int( words[1] ), float( words[2] ), words[3] )
people.append( person )
# display the list of names and their age
print( "Names: " )
for person in people:
print( person.toString() )
# add a new person to the list
people.append( Person("Xiaole", 21, 3.9, "CSC") )
# modify age of person named Alka
for person in people:
if person.getName().lower() == "alka":
person.setAge( person.getAge() + 1 )
# display the list of names and their age
print( "Names: " )
for person in people:
print( person.toString() )
# =================================================================
def displayDogs( list, caption ):
print( caption )
for dog in list:
print( dog.toString() )
print()
def playWithDogs():
dogs = []
dogs.append( Dog( "Rex", 4, True, "German Shepherd" ) )
displayDogs( dogs, "List of 1 dog" )
dogs.append( Dog( "Fifi", 1, False, "Poodle" ) )
dogs.append( Dog( "Samson", 3, True, "Great Dane" ) )
dogs.append( Dog( "Mad Max", 2, False, "Poodle" ) )
displayDogs( dogs, "List of 4 dogs" )
# find vaccinated dogs
vaccinated = []
for dog in dogs:
if dog.isVaccinated():
vaccinated.append( dog )
displayDogs( vaccinated, "The vaccinated dogs are: " )
# ask user for a breed
breed = input( "Please enter a breed: " ).strip()
# find all the dogs with this breed
sameBreed = []
for dog in dogs:
if dog.getBreed().lower() == breed.lower():
sameBreed.append( dog )
displayDogs( sameBreed, "Dogs of breed "+ breed )
# =================================================================
def playWithPlanets():
planets = PlanetList()
print( planets.toString() )
largest = planets.getLargest()
print( "Largest planet = ", largest )
smallest = planets.getSmallest()
print( "Smallest planet = ", smallest )
print( "Number of planets in list: ", planets.getNoOfPlanets() )
planets.addNewPlanetFromInput()
print( planets.toString() )
# =================================================================
def main():
main0()
#playWithPeople
#playWithDogs()
playWithPlanets()
main()
