Jack is testing the Student class developed earlier in this chapter. He creates an instance of this class with $0$ scores and receives an error message when he attempts to view the average score:

$>>>$ s $=$ Student$("$Jack$",0)$

$>>>$ print$($s$)$

Name: Jack

Scores:

$>>>$ s$.$getAverageScoreScore$()$

Traceback $($most recent call last$)$:

File $"",$ line $1,$ in

s$.$getAverageScore$()$

File $"/$Users$/$ken$/$pythonfiles$/$student$.$py$",$ line $42,$ in getAverageScoreScore

return sum$($self$.$scores$)/$ len$($self$.$scores$)$

ZeroDivisionError: division by zero

Explain the error detected during this test and prevent it from happening.

$"""$

File: student.py

Resources to manage a student's name and test scores.

$"""$

class Student$($object$)$:

$"""$Represents a student."""

def $\_\_$init$\_\_($self$,$ name, number$)$:

$"""$All scores are initially $0."""$

self.name $=$ name

self.scores $=[]$

for count in range$($number$)$:

self.scores.append$(0)$

def getName$($self$)$:

$"""$Returns the student's name."""

return self.name

def setScore$($self$,$ i$,$ score$)$:

$"""$Resets the ith score, counting from $1."""$

self.scores$[$i $-1]=$ score

def getScore$($self$,$ i$)$:

$"""$Returns the ith score, counting from $1."""$

return self.scores$[$i $-1]$

def getAverageScore$($self$)$:

$"""$Returns the average score."""

return sum$($self$.$scores$)/$ len$($self$.$scores$)$

def getHighScore$($self$)$:

$"""$Returns the highest score."""

return max$($self$.$scores$)$

def $\_\_$str$\_\_($self$)$:

$"""$Returns the string representation of the student."""

return "Name: $"+$ self.name $+"$

Scores: $"+\backslash$

$"".$join$($map$($str$,$ self.scores$))$

def main$()$:

s $=$ Student$("$Jack$",0)$

print$($s$)$

s$.$getAverageScore$()$

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

main$()$