#!/usr/bin/env python3
class Student:
def __init__(self, name, number):
self.name = name
self.number = number
self.courses = {}
def displayStudent(self):
return 'Student Name: ' + self.name + '\n' + 'Student Number: ' + str(self.number)
def addGrade(self, course, grade):
self.courses[course] = grade
def displayGPA(self):
if len(self.courses) == 0:
errormsg = print('Wrong Input')
return errormsg
else:
gpa = 0.0
for course in self.courses.keys():
gpa = gpa + self.courses[course]
return 'GPA of student ' + self.name + ' is ' + str(gpa / len(self.courses))
def displayCourses(self):
return [k for k in self.courses.keys() if self.courses[k] > 0]
if __name__ == '__main__':
# Create first student object and add grades for each class
student1 = Student('John', '013454900')
student1.addGrade('uli101', 1.0)
student1.addGrade('ops235', 2.0)
student1.addGrade('ops435', 3.0)
# Create second student object and add grades for each class
student2 = Student('Jessica', '123456')
student2.addGrade('ipc144', 4.0)
student2.addGrade('cpp244', 3.5)
student2.addGrade('cpp344', 0.0)
# Display information for student1 object
print(student1.displayStudent())
print(student1.displayGPA())
print(student1.displayCourses())
# Display information for student2 object
print(student2.displayStudent())
print(student2.displayGPA())
print(student2.displayCourses())
Проблема в displayGPA()
может делить на ноль (ZeroDivisionError
), если в словарь не добавлены курсы, или классы, добавленные в словарь, равны 0.0
.
Вы можете попробовать decimal
модуль:
from decimal import *
setcontext(ExtendedContext)
value = 123 / Decimal(0) # value is now Decimal('Infinity')
print(str(float(value)))
Выход:
'inf'
Вы всегда можете использовать try
и except
block. Вот пример того, как они работают:
try:
x = num1 / num2 # num1 and num2 are numbers defined somewhere else in this code
except ZeroDivisionError:
print("Zero division error") # Or make Python do something else