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1 class Course: 2 B 4 5 7 B B 6 7 8 9 definit__(self): self.roster = [] 2 1 2 B 4 class Student: 5 def add student (self, student): self.roster.append(student) 4 5 6 def drop_student (self, last_name): for i, student in enumerate(self.roster): if student.get_last() == last_name: del self.roster[i] break definit__(self, first, last, gpa): self.first = first self.last last self.gpagpa 2 1 2 3 def main(): def get_last (self): return self.last course Course() henry Student ("Henry", "Nguyen", 3.5) brenda = Student ("Brenda", "Stern", 2.0) lynda Student ("Lynda", "Robison", 3.2) sonya = Student ("Sonya", "King", 3.9) = 8 9 course.add_student (henry) 2 course.add_student (brenda) 1 course.add_student (lynda) 2 course.add_student (sonya) B print("Course size:", len(course.roster), "students") 4 course.drop_student("Stern") 5 print("Course size after drop: ", len(course.roster), "students") 6 7 if __name__ 8 main() 11 == __main__":

1 class Course: 2 B 4 5 7 B B 6 7 8 9 definit__(self): self.roster = [] 2 1 2 B 4 class Student: 5 def add student (self, student): self.roster.append(student) 4 5 6 def drop_student (self, last_name): for i, student in enumerate(self.roster): if student.get_last() == last_name: del self.roster[i] break definit__(self, first, last, gpa): self.first = first self.last last self.gpagpa 2 1 2 3 def main(): def get_last (self): return self.last course Course() henry Student ("Henry", "Nguyen", 3.5) brenda = Student ("Brenda", "Stern", 2.0) lynda Student ("Lynda", "Robison", 3.2) sonya = Student ("Sonya", "King", 3.9) = 8 9 course.add_student (henry) 2 course.add_student (brenda) 1 course.add_student (lynda) 2 course.add_student (sonya) B print("Course size:", len(course.roster), "students") 4 course.drop_student("Stern") 5 print("Course size after drop: ", len(course.roster), "students") 6 7 if __name__ 8 main() 11 == __main__":

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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1:Compare output Your output 2:Unit test ^ Tests course.drop_student('Sally') drops Sally from the course AttributeError: 'Course' object has no attribute 'count_students' 3:Unit test ^ Course size: 4 students Course size after drop: 3 students 4:Unit test Tests course.drop_student('Sally') and course.drop_student('Tyson') drops Sally and Tyson from the course AttributeError: 'Course' object has no attribute 'count_students' Tests course.drop_student('Fish') drops no students from the course AttributeError: 'Course' object has no attribute 'count_students' 3/3 0/2 0/2 0/3
Transcribed Image Text:1:Compare output Your output 2:Unit test ^ Tests course.drop_student('Sally') drops Sally from the course AttributeError: 'Course' object has no attribute 'count_students' 3:Unit test ^ Course size: 4 students Course size after drop: 3 students 4:Unit test Tests course.drop_student('Sally') and course.drop_student('Tyson') drops Sally and Tyson from the course AttributeError: 'Course' object has no attribute 'count_students' Tests course.drop_student('Fish') drops no students from the course AttributeError: 'Course' object has no attribute 'count_students' 3/3 0/2 0/2 0/3
1 class Course: 2 definit__(self): self.roster 3 4 5 6 7 8 9 0 1 2 3 4 class Student: 5 6 7 8 9 0 1 2 3 def main(): 4 5 6 7 Student ("Brenda", "Stern", 2.0) lynda Student ("Lynda", "Robison", 3.2) Student ("Sonya", "King", 3.9) 8 sonya 9 0 course.add_student (henry) course.add_student(brenda) course.add_student (lynda) 1 2 course.add_student (sonya) 3 print("Course size:", len(course.roster), "students") 4 5 6 7 if __name__ == 8 main() def add_student(self, student): self.roster.append(student) def drop_student (self, last_name): for i, student in enumerate(self.roster): if student.get_last() del self.roster[i] break definit__(self, first, last, gpa): self.first = first self.last = last self.gpagpa def get_last (self): return self.last = course = Course() henry Student ("Henry", "Nguyen", 3.5) brenda last_name: 11 course.drop_student("Stern") print("Course size after drop: ", len(course.roster), "students") _main__":
Transcribed Image Text:1 class Course: 2 definit__(self): self.roster 3 4 5 6 7 8 9 0 1 2 3 4 class Student: 5 6 7 8 9 0 1 2 3 def main(): 4 5 6 7 Student ("Brenda", "Stern", 2.0) lynda Student ("Lynda", "Robison", 3.2) Student ("Sonya", "King", 3.9) 8 sonya 9 0 course.add_student (henry) course.add_student(brenda) course.add_student (lynda) 1 2 course.add_student (sonya) 3 print("Course size:", len(course.roster), "students") 4 5 6 7 if __name__ == 8 main() def add_student(self, student): self.roster.append(student) def drop_student (self, last_name): for i, student in enumerate(self.roster): if student.get_last() del self.roster[i] break definit__(self, first, last, gpa): self.first = first self.last = last self.gpagpa def get_last (self): return self.last = course = Course() henry Student ("Henry", "Nguyen", 3.5) brenda last_name: 11 course.drop_student("Stern") print("Course size after drop: ", len(course.roster), "students") _main__":
Expert Solution
Introduction:

  • Class Student defines a Student object, which has the properties first, last, and gpa.

  • Class Course defines a Course object, which contains a list of Student objects (roster).
    The drop_student() method loops through the roster and deletes the student with the matching last name.
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