Question

Using Python:

Par 1.

You will define Student class with the following attributes:

• CWID: the student’s CWID
• FirstName: the student’s first name
• LastName: the student’s last name
• Gender: the student’s gender (‘M’ or ‘F’)
• BirthDate: the student’s date of birth (e.g. ‘03/14/1999’)
• ClassID: the class id that the student took
• ClassDate: the date when the student took the class (e.g. ‘01/26/2018’)
• Grade: the student’s grade for the class

In addition, you will do the following tasks:

1. Implement a set of setter/getter methods and properties (defined via property() built-in function) which can be used to access the above attributes
2. Implement a constructor which takes the following string (the format defined in HW assignment #1) as the input parameter:
   1. CWID:3472634, FirstName:John, ……, Grade:3.7   
3. Implement a method named output which uses str.format() to generate a string according to the following format specification (attributes, and the output ordering and output format of each attribute). The method also returns the generated string.

	Attribute	Width	Alignment
1	CWID	12	Center
2	FirstName	15	Left justified
3	LastName	10	Left justified
4	ClassID	9	Center
5	Grade	5	Right justified

Part 2.

Implement Python function according to the following requirements:

• The function takes an input parameter defining the name of a file in which every record defines data for one student and has the layout defined in above task 2.
• For each record in the file, the function does the following:

• Use the record to create a Student object
• Attach the Student object into a list object

• For each Student object, the function calls its output method defined in above task 3 to generate the formatted string and then write the string to a file the name of which is passed as the second input parameter of the function.

Answer 1

Thanks for the question, I have done both Part 1 and Part 2. here is the code with screenshot.

Let me know for any questions or doubts.

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class Student():

    def __init__(self,cwid,fname,lname,gender,date,id,class_Date,grade):
        self.cwid=cwid
        self.first_name=fname
        self.last_name=lname
        self.gender=gender
        self.birth_date=date
        self.class_id=id
        self.class_date=class_Date
        self.grade=grade

    def set_cwid(self,cwid):
        self.cwid=cwid
    def set_first_name(self,fname):
        self.first_name=fname
    def set_last_name(self,lname):
        self.last_name=lname
    def set_gender(self,gender):
        self.gender=gender
    def set_birth_date(self,date):
        self.birth_date=date
    def set_class_id(self,id):
        self.class_id=id
    def set_class_date(self,date):
        self.class_date=date
    def set_grade(self,grade):
        self.grade=grade

    def get_cwid(self):
        return self.cwid
    def get_first_name(self):
        return self.first_name
    def get_last_name(self):
        return self.last_name
    def get_gender(self):
        return self.gender
    def get_birth_date(self):
        return self.birth_date
    def get_class_id(self):
        return self.class_id
    def get_class_date(self):
        return self.class_date
    def get_grade(self):
        return self.grade

    def output(self):
        return str.format('{0:^12}{1:<15}{2:<10}{3:^9}{4:>5}',self.cwid,self.first_name,self.last_name,\
                          self.class_id,self.grade)

# Part 1
student=Student(3472634,'John','Peter','M','03/14/1999',123,'03/14/2015',3.7)
print(student.output())

# Part 2
def main():
    # read data from file
    file_name='D:\\students.txt'
    students_list=[]
    with open(file_name,'r')as read_file:
        # read each line
        for line in read_file.readlines():
            # split the line by comma
            line = line.strip().split(',')
            # create object of student
            s=Student(int(line[0]),line[1],line[2],line[3],line[4],line[5],line[6],float(line[7]))
            # aadd the object to the student list
            students_list.append(s)
    # iterate over the list and print each object
    for student in students_list:
        print(student.output())

main()

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