Python 2中的类或对象而不是字典

class or object instead of dictionaries in Python 2

我通常使用嵌套字典，但我想转移到类和对象中。我有一份家庭工作成绩清单，如下所示：

1	assignment_name assignment_subject student_name due_date grade grade_pct rank

我想做一个能容纳所有学生的物体，每个学生能容纳他们所有的作业细节。我的字典看起来像：

1	homeworks['student_name']['assignment_name'] = {'assignment_subject': 'math', 'due_date': '11/12/13', 'grade': 15, 'grade_pct': 15/20.0, 'rank': 'B'}

号

这应该是一个类中的一个类吗？

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class Homeworks(object):
def _init_(self):
self.students

class student(object):
def _init_(self,student_name):
self.student_name = student_name

def add_assignment(line):
student.assignment_name = line[0]
student.assignment_subject = line[1]
student.grade = line[4]

我知道这不对。我不知道我是否在正确的轨道上。我需要能够获得一个学生的成绩。(for assignment in Homeworks['Robbie Michaels'].keys(): print Homeworks['Robbie Michaels'][assignment]['grade']号)我也喜欢使用if assignment_subject == 'math'号等访问它们。

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class student:
def __init__(self, student_name):
self.name = student_name

class homework:

def __init__(self,student_name,assignment_name,assignment_subject,grade):
self.student = student(student_name)
self.assignment_name = assignment_name
self.assignment_subject = assignment_subject
self.grade = grade

@classmethod
def new_hw(cls, line):
return cls(line[0],line[1],line[2],line[3])

@classmethod
def get_all_grades(cls, student_name, homework_list):
return [ x.grade for x in homework_list if student_name is x.student.name]

lines = [["abc","a","b","A"],["abc","c","d","B"],["ebc","c","d","B"]]
hw_list = [homework.new_hw(line) for line in lines]
print homework.get_all_grades("abc",hw_list)

号

你需要理解的是"如何面向对象设计？".上面的代码，可能不是最好的设计，因此，试着学习从哪里开始。如何在Python中设计类？