def read_data(assessment, classlist):
    len_of_q = (len(assessment.get_answer_list()))
    histo = Histogram(len_of_q + 1, len_of_q)
    #stu = Student(s.get_name(), s.get_id(), s.get_email())
    #stu_marks = stu.get_marks()
    #my_list =  []

    name_of_ass = assessment.get_name() +".txt"
    file = open(name_of_ass, "r")
    contents = file.read().splitlines()
    file.close()
    #split_1 = contents.split("\n")

    counter = 0

    for char in contents:
        id,data = char.split(":")
        marks = assessment.calculate_marks(data)
        final_marks = classlist[counter].append_marks(marks)
        #histo.append_marks(final_marks)
        counter += 1
        #my_list.append(marks)

    return histo

        #histo.append_marks(calculate)
        #for marks in list(calculate):
            #stu.append_marks(marks)