FIT9136 Algorithm and programming foundation in Python
Assignment 2
Lecturer in Charge: Maghool
April 2022
Copyright By PowCoder代写 加微信 powcoder
Table of Contents
1. Key Information
1.1. Do and Do NOT 1.2. Documentation 1.3. Submission
2. Getting help
2.1. English language skills
2.2. Study skills
2.3. Things are tough right now
2.4. Things in the unit don’t make sense 2.5. I don’t know what I need
3. Key tasks (100 marks) 3.1. User class
3.1.1 constructor
3.1.2 generate_unique_user_id() 3.1.3 encryption(input_password) 3.1.4 login()
3.1.5 extract_info()
3.1.6 view_courses(args=[])
3.1.7 view_users()
3.1.8 view_reviews(args=[])
3.1.9 remove_data()
3.1.10 __str__()
3.2. Admin class
3.2.1 constructor
3.2.2 register_admin()
3.2.3 extract_course_info() 3.2.4 extract_review_info() 3.2.5 extract_students_info() 3.2.6 extract_instructor_info() 3.2.7 remove_data()
3.2.7 remove_data()
3.2.8 view_courses(args=[]) 3.2.9 view_users()
3.2.10 view_reviews(args=[]) 3.2.11 __str__()
3.3. Instructor class
3.3.1 constructor
3.3.2 view_courses(args=[]) 3.3.3 view_reviews(args=[]) 3.3.4 __str__()
3.4. Student class 12 3.4.1 constructor 13 3.4.2 view_courses(args=[]) 13 3.4.3 view_reviews(args=[]) 13 3.4.4 __str__() 13
3.5. Course class 13 3.5.1 constructor 13 3.5.2 find_course_by_title_keyword(keyword) 13 3.5.3 find_course_by_id(course_id) 14 3.5.4 find_course_by_instructor_id(instructor_id) 14 3.5.5 courses_overview() 14 3.5.6 __str__() 14
3.6. Review class 14 3.6.1 constructor 14 3.6.2 find_review_by_id(review_id) 14 3.6.3 find_review_by_keywords(keyword) 14 3.6.4 find_review_by_course_id(course_id) 15 3.6.5 reviews_overview() 15 3.6.6 __str__() 15
3.7. Main test file 15 3.7.1 show_menu() 15 3.7.2 process_operations(user_object) 15
3.7.2 main()
3.7.3 if __name__ == “__main__”: 3.8. Demo of program
Important Notes:
1. Key Information
This assessment is related to the following learning objectives (LO):
● LO2: Restructure a computational program into manageable units
of modules and classes using the object-oriented methodology
● LO3: Demonstrate Input/Output strategies in a Python application
and apply appropriate testing and exception handling techniques
It is an Individual assignment where you will write a Python code for simple emulation of data processing. Your application should be able to ask the user to input a username, password to login into your system. The system should be able to identify the role of this user and allow corresponding operations.
30% of your total marks for the unit
[Friday 6th May 2022, week 9] 4:30 pm
Submission
● Via Moodle Assignment Submission.
● Turnitin will be used for similarity checking of all submissions.
Assessment Criteria
See Moodle Assessment page
Late Penalties
● 10% deduction of the available mark per calendar day or part thereof for up to one week
● Submissions more than 7 calendar days after the due date will receive a mark of zero (0) and no assessment feedback will be provided.
Support Resources
See Moodle Assessment page
Feedback will be provided on student work via:
general cohort performance
specific student feedback ten working days post submission
1.1. Do and Do NOT
● Maintain academic integrity1
● Get support early from this unit and other
services in the university
● Apply for special consideration for
extensions if needed (optional)2
● Attend an interview (No attendance = 0 for
Assignment 2)
● Leave your assignment in draft mode
● Submit late (10% daily penalty applies)3
● Submission is not accepted after 7 days of
the due date, unless you have special consideration.
1.2. Documentation
Commenting your code is essential as part of the assessment criteria (refer to Marking Rubrics).
You should also include comments at the beginning of your program file, which specify your name, your Student ID, the start date and the last modified date of the program, as well as with a high-level description of the program. In-line comments within the program are also part of the required documentation.
1.3. Submission
Your have to submit your assignment via the assignment submission link (i.e., “Assignment 1 Submission”) on the Moodle site by the deadline specified in Section 1, i.e. 6th May 2022 (Friday) by 4:30 pm:
● There will be NO hard copy submission required for this assignment.
● You are required to submit your assignment as a .zip file named with your Student ID. For example, if your Student ID is 12345678, you would submit a zipped file named 12345678.zip
● The submission files are to be submitted and must exist in your FITGitLab server repo (i.e, Assessments/Assignment02), which shows your development history of at least three pushes.
https://www.monash.edu/rlo/research-writing-assignments/referencing-and-academic-integrit y/academic-integrity
2 https://www.monash.edu/exams/changes/special-consideration (All the Special Consideration should be applied no later than two University working days after the due date of the affected assessment). 3 eg: original mark was 70/100, submitting 2 days late results in 50/100 (10 marks off). This includes weekends
● Do not include any unnecessary file in this folder
● Note that marks will be deducted if this requirement is not strictly complied
● No submission is accepted via email.
● Please note we cannot mark any work on the FITGitLab Server. You need to
ensure that you submit via Moodle where you need to accept the student declaration. It is your responsibility to ENSURE that the submitted files are the correct files. We strongly recommend after uploading a submission, and prior to actually submitting in Moodle, that you download the submission and double-check its contents. Marks will be deducted for any of the requirements that are not complied with.
1.4. Deliverables
Your submission should contain the following documents:
● Course.py, Review.py, User.py, Admin.py, Instructor.py, Student.py and Main.py files in one zipped file.
● Marks will be deducted for any of these requirements that are not strictly complied with.
2. Getting help
2.1. English language skills
if you don’t feel confident with your English.
● Talk to English Connect: https://www.monash.edu/english-connect
2.2. Study skills
If you feel like you just don’t have enough time to do everything you need to, maybe you just need a new approach
● Talk to a learning skills advisor: https://www.monash.edu/library/skills/contacts
2.3. Things are tough right now
Everyone needs to talk to someone at some point in their life, no judgement here.
● Talk to a counsellor: https://www.monash.edu/health/counselling/appointments (friendly, approachable, confidential, free)
2.4. Things in the unit don’t make sense
Even if you’re not quite sure what to ask about, if you’re not sure you won’t be alone, it’s always better to ask.
● Ask questions in Ed: https://edstem.org/au/courses/7429/discussion/
● Attend a consultation:
https://lms.monash.edu/course/view.php?id=135703§ion=21
2.5. I don’t know what I need
Everyone at Monash University is here to help you. If things are tough now, they won’t magically get better by themselves. Even if you don’t exactly know, come and talk with us, and we’ll figure it out. We can either help you ourselves or at least point you in the right direction.
3. Key tasks (100 marks)
This assignment is a simple emulation of data processing. Your application should be able to ask the user to input username, password to login into your system. The system should be able to identify the role of this user and allow corresponding operations.
This is an individual assignment and must be your own work.
The allowed libraries are random, math, os and re. You will not receive marks for the components if you use any other libraries apart from the mentioned library.
Please finish reading the description of all classes before starting the implementation.
3.1. User class
User class handles the fundamental methods of all users. The User class is the parent class of Admin, Instructor and Student classes.
3.1.1 constructor
A user must have id(int, default value -1), username(str, default value “”), password(str, default value “”).
3.1.2 generate_unique_user_id()
This method checks the files user_admin.txt, user_instructor.txt and user_student.txt to generate an unique user id. The return result is a 10 digits integer.
3.1.3 encryption(input_password)
This method encrypts the input_password to a string that is difficult to read by humans. Reuse the encryption algorithm that was in A1 to encode the input password. The encrypted password will be returned and the type is string.
3.1.4 login()
Each user can call the login method to perform authentication. In this login() method, it is required to call the encryption() method defined before to encode the password. The encoded password can be used to compare with the password extracted from files. You are required to to check the user_admin.txt, user_instructor.txt and user_student.txt file according to the username and password and return a tuple which contains the login_result(bool type), login_user_role(str type, the values can only be “Admin”, “Instructor”, “Student”), login_user_info(any type e.g. list or tuple
or str, this value can be used to create different types of user object (Admin, Student or Instructor)).
3.1.5 extract_info()
This method prints out a message “You have no permission to extract information”.
3.1.6 view_courses(args=[])
This method prints out a message “You have no permission to view courses”.
3.1.7 view_users()
This method prints out a message “You have no permission to view users”.
3.1.8 view_reviews(args=[])
This method prints out a message “You have no permission to view reviews”.
3.1.9 remove_data()
This method prints out a message “You have no permission to remove data”.
3.1.10 __str__()
This method returns a formatted user string: “user_id;;;username;;;password”. All the attributes are concatenated using “;;;”.
3.2. Admin class
Admin class inherits from the User class.
3.2.1 constructor
Admin only have attributes id(int, default value -1), username(str, default value “”) and password(str, default value “”) which can be inherited from the parent class.
3.2.2 register_admin()
This method checks the user_admin.txt file to find out whether the username already exists or not. If not, register this admin. If it exists, do nothing.
3.2.3 extract_course_info()
This method can get course information from the raw_data.txt. The extracted course info should be saved into file following the format below:
“course_id;;;course_title;;;image_100x100;;;headline;;;num_of_
subscribers;;;avg_rating;;;course_content_length”
For each line in the raw_data.txt file, you can copy and paste it to Json Parser Online to check the format. Each line contains more than one course. All the corresponding attributes can be found in the text. You can use the library re or str methods to extract the data. The course content length in the text is like “40.5 hours”. Only 40.5
need to be retrieved. The course data will be saved into the course.txt file.
3.2.4 extract_review_info()
This method can get review information from the review_data folder. The extracted review info saving format is
“review_id;;;review_content;;;review_rating;;;course_id”
The course id can be obtained from each file’s name in the review_data folder.
3.2.5 extract_students_info()
This method can get student information from the review_data folder. Each review string contains one user information. Assume each user only has one review. The attributes of each student are id, username, password, user_title, user_image_50x50, user_initials and review_id. If a student’s id cannot be found in the string, you need to generate it by calling the generate_unique_user_id() method defined in the User class. The username should be generated by converting the user_title to lowercase and replacing all the whitespace to underscore. The password is generated by converting user_initials to lowercase and combining the user id. The password expression looks like “user_initials + user_id + user_initials”. User_initials can be obtained from the review data. For example, user_id is 12345, user initials is “DE”, the password is “de12345de”. The student info will be written into file user_student.txt and the format example is:
This method extracts information from the raw_data.txt file in the course_data folder. Each course item contains several instructor information. The username is generated by converting the instructor_display_name to lowercase and replacing all the whitespace to underscore. The password uses the instructor id directly. The instructor info saving format example is:
“id;;;username;;;password;;;user_title;;;user_image_50x50;;;us
er_initials;;;review_id”
3.2.6 extract_instructor_info()
“id;;;username;;;password;;;display_name;;;job_title;;;image_1
00×100;;;course_id1–course_id2–course_id3–course_id4”
Since each instructor can teach more than one course, before saving the instructor information, you need to check whether the instructor already exists in the user_instructor.txt file or not. If it exists, the course id should be appended to the existing instructor string. For example, given an instructor string:
If a new course id 55555 is teached by this instructor, the string will be updated as below:
The format of instructor data will be explained in the Instructor class section.
3.2.7 extract_info()
This method calls all the extract info methods defined before, including extract_course_info(), extract_instructor_info(), extract_students_info() and extract_review_info().
3.2.7 remove_data()
This method can delete all the data in the course.txt, review.txt, user_student.txt and user_instructor.txt files.
3.2.8 view_courses(args=[])
This method will call the methods implemented in Course class to perform various view course methods. The variable “args” can be an empty list or must contain two elements. The first element is the command(can only be “TITLE_KEYWORD/ID/INSTRUCTOR_ID”) and the second element is the value(could be title keyword, course id or instructor id). For example, args=[“TITLE_KEYWORD”, “web”]. If the “args” is an empty list, printing out the overview of courses (using the course_overview method implemented in Course class). Add validations to provide proper output message if user input incorrect command or values.
3.2.9 view_users()
This method prints out the total number of admin, instructor and students separately with proper description messages.
3.2.10 view_reviews(args=[])
This method will call the methods implemented in Review class to perform various view review methods. The args list can be empty or must contain two elements. The first element is the command(can only be “ID/KEYWORD/COURSE_ID”) and the second element is the value(could be review id, review keyword or course id). If the args is an empty list, print out the overview of reviews(using the review_overview method implemented in Review class); Add validations to provide proper output message if user input incorrect command or values.
3.2.11 __str__()
Since the Admin class does not have any instance variables different from the User class, you can use the parent class’s __str__ method directly.
3.3. Instructor class
The Instructor class inherits from the User class.
3.3.1 constructor
The attributes of instructor are id(int, default value -1), username(str, default value “”), password(str, default value “”), display_name(str, default value “”), job_title(str, default value “”), image_100x100(str, default value “”), course_id_list(list, default value []).
3.3.2 view_courses(args=[])
Print out all the courses taught by this instructor. This can be reached by calling the method implemented in the Course class. If the number of courses is greater than 10, only print 10 courses. The args positional argument is not used in this method.
3.3.3 view_reviews(args=[])
Print out all the reviews belong to the courses this instructor teaches. This can be achieved by calling the method implemented in the Course class. If the number of reviews is greater than 10, only print 10 reviews. Also print out the total number of all reviews. The args positional argument is not used in this method.
3.3.4 __str__()
Use the Parent class __str__ method. The return result format is: .
3.4. Student class
Student class inherits from the User class.
3.4.1 constructor
The attributes of student are id(int, default value -1), username(str, default value “”), password(str, default value “”), user_title(str, default value “”), user_image_50x50(str, default value “”), user_initials(str, default value “”), review_id(int, default value -1).
3.4.2 view_courses(args=[])
This method prints out the course this student registered. If a student reviews a course, it is assumed that the student is registered in that course. The args positional argument is not used in this method. Just have it when doing method declaration.
3.4.3 view_reviews(args=[])
This method prints out the review this student wrote. The args positional argument is not used in this method. Just have it when doing method declaration.
“user_id;;;username;;;password;;;display_name;;;job_title;;;im
age_100x100;;;123123–323–32–3123–3123”
3.4.4 __str__()
Use the parent is:
3.5. Course class
3.5.1 constructor
method. The
”user_id;;;username;;;password;;;title;;;image_50x50;;;initia
ls;;;review_id”
The attributes of course are course_id(int, default value -1), course_title(str, default value “”), course_image_100x100(str, default value “”), course_headline(str, default
value “”), course_num_subscribers(int, default value -1), course_avg_rating(float, default value -1.0), course_content_length(float, default value -1.).
3.5.2 find_course_by_title_keyword(keyword)
This method has a positional argument keyword(str). Based on the given keyword, it searches the course title of all courses in the course.txt file to find the result. All the result courses will be created as a course object and added into a result list. Finally, return the result list. The result list looks like [Course(), Course(), Course()….]. If not found, return an empty list.
3.5.3 find_course_by_id(course_id)
This method has a positional argument course id(int or str). You are required to search for the course according to the course id. A course object will be returned. If not found, return None.
3.5.4 find_course_by_instructor_id(instructor_id)
This method has a positional argument instructor id(int or str). Based on the instructor id, a list of course objects will be generated and returned. The result list looks like [Course(), Course(), Course()….]. If not found, return an empty list.
3.5.5 courses_overview()
This method returns a string that shows the total number of courses.
3.5.6 __str__()
Return a string containing all course information.
3.6. Review class
3.6.1 constructor
The attributes of review are id(int, default value -1), content(str, default value “”), rating(float, default value -1.0), course_id(int, default value -1).
3.6.2 find_review_by_id(review_id)
This method has a positional argument review id(int or srt). It finds the review information based on the given id from the review.txt file. A review object will be returned. If not found, return None.
3.6.3 find_review_by_keywords(keyword)
This method has a positional argument keyword(str). It finds the reviews whose content contains the given keyword from the review.txt file. A list of review objects will be generated and returned. The result list looks like [Review(), Review(), Review()….]. If not found, return an empty list. The keyword cannot be empty.
3.6.4 find_review_by_course_id(course_id)
This method has a positional argument course id(int or str)
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