Question

Problem 2-3 : 5.0 points

Modify the EdxStudent class so that it passes all the unit tests, without throwing any exceptions.

Paste your entire definition of the class into this box.

Answer 1

Consider the following class definition:

class EdxStudent(object):
def __init__(self,first,last):
self.setName("given",first)
self.setName("family",last)

def setName(self,which,name):
if which == "given" or which == "first":
self.firstName = name
elif which == "family" or which == "last":
self.lastName = name
else:
raise ChoiceError(which)

def getName(self,which):
if which == "given" or which == "first":
return firstName
elif which == "family" or which == "last":
return lastName
raise ChoiceError(which)

class ChoiceError(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr("Invalid value for name field:"+self.value)


firstName = "Raquel"
lastName = "Pomplun"

try:
student = EdxStudent(firstName,lastName)

initialFirstName = student.getName("first")
initialLastName = student.getName("last")


newFirstName = student.getName("given")
newLastName = student.getName("family")

if initialFirstName == newFirstName and initialLastName == newLastName:
print "Passed unit test 1"
else:
print "Failed unit test 1"

student.setName("given","LeBron")
student.setName("family","James")

if "LeBron"+"James" == student.getName("first")+student.getName("last"):
print "Passed unit test 2"
else:
print "Failed unit test 2"

except ChoiceError as e:
print "Failed unit test. Exception is:",
print e

Answer 2

This might help: class EdxStudent(object):
http://pythontutor.com/visualize.html#code=class+EdxStudent(object)%3A%0A++++++def+__init__(self,first,last)%3A%0A+++++++++++++self.setName(%22given%22,first)%0A+++++++++++++self.setName(%22family%22,last)%0A%0A++++++def+setName(self,which,name)%3A%0A++++++++++++if+which+%3D%3D+%22given%22+or+which+%3D%3D+%22first%22%3A%0A++++++++++++++++++self.firstName+%3D+name%0A++++++++++++elif+which+%3D%3D+%22family%22+or+which+%3D%3D+%22last%22%3A%0A++++++++++++++++++self.lastName+%3D+name%0A++++++++++++else%3A%0A++++++++++++++++++raise+ChoiceError(which)%0A%0A++++++def+getName(self,which)%3A%0A++++++++++++if+which+%3D%3D+%22given%22+or+which+%3D%3D+%22first%22%3A%0A++++++++++++++++++return+firstName%0A++++++++++++elif+which+%3D%3D+%22family%22+or+which+%3D%3D+%22last%22%3A%0A++++++++++++++++++return+lastName%0A++++++++++++raise+ChoiceError(which)%0A%0Aclass+ChoiceError(Exception)%3A%0A+++++def+__init__(self,+value)%3A%0A+++++++++self.value+%3D+value%0A+++++def+__str__(self)%3A%0A+++++++++return+repr(%22Invalid+value+for+name+field%3A%22%2Bself.value)%0A%0A%0AfirstName+%3D+%22Raquel%22%0AlastName+%3D+%22Pomplun%22%0A%0Atry%3A%0A++++++++student+%3D+EdxStudent(firstName,lastName)%0A%0A++++++++initialFirstName+%3D+student.getName(%22first%22)%0A++++++++initialLastName+%3D+student.getName(%22last%22)%0A%0A%0A++++++++newFirstName+%3D+student.getName(%22given%22)%0A++++++++newLastName+%3D+student.getName(%22family%22)%0A%0A++++++++if+initialFirstName+%3D%3D+newFirstName+and+initialLastName+%3D%3D+newLastName%3A%0A+++++++++++++++print+%22Passed+unit+test+1%22%0A++++++++else%3A%0A+++++++++++++++print+%22Failed+unit+test+1%22%0A%0A++++++++student.setName(%22given%22,%22LeBron%22)%0A++++++++student.setName(%22family%22,%22James%22)%0A%0A++++++++if+%22LeBron%22%2B%22James%22+%3D%3D+student.getName(%22first%22)%2Bstudent.getName(%22last%22)%3A%0A+++++++++++++++print+%22Passed+unit+test+2%22%0A++++++++else%3A%0A+++++++++++++++print+%22Failed+unit+test+2%22%0A%0Aexcept+ChoiceError+as+e%3A%0A+++++++print+%22Failed+unit+test.+Exception+is%3A%22,%0A+++++++print+e&mode=display&cumulative=false&heapPrimitives=false&drawParentPointers=false&textReferences=false&showOnlyOutputs=false&py=2&curInstr=0

Answer 3

Basically all you have to do is make it so this part is passable:
if "LeBron"+"James" == student.getName("first")+student.getName("last"):
print "Passed unit test 2"
else:
print "Failed unit test 2"

Answer 4

class EdxStudent(object):
def __init__(self,first,last):
self.setName("given",first)
self.setName("family",last)

def setName(self,which,name):
if which == "given" or which == "first":
self.firstName = name
elif which == "family" or which == "last":
self.lastName = name
else:
raise ChoiceError(which)

def getName(self,which):
if which == "given" or which == "first":
return firstName
elif which == "family" or which == "last":
return lastName
raise ChoiceError(which)

class ChoiceError(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr("Invalid value for name field:"+self.value)


firstName = "LeBron"
lastName = "James"

try:
student = EdxStudent(firstName,lastName)

initialFirstName = student.getName("first")
initialLastName = student.getName("last")


newFirstName = student.getName("given")
newLastName = student.getName("family")

if initialFirstName == newFirstName and initialLastName == newLastName:
print "Passed unit test 1"
else:
print "Failed unit test 1"

student.setName("given","LeBron")
student.setName("family","James")

if "LeBron"+"James" == student.getName("first")+student.getName("last"):
print "Passed unit test 2"
else:
print "Failed unit test 2"

except ChoiceError as e:
print "Failed unit test. Exception is:",
print e

Answer 5

fault :(

Answer 6

help

Answer 7

No it should be fine. I got it right myself. Anyways, visit this site- http://www.getstudyroom.com/course/40429
I can help there.