Code Review Comments (Uriel)

May 20, 2025 by ADMIN 29 views

In this article, we will be discussing the code review comments provided by Uriel for the given Python code. The code is divided into four files: Students.py, Courses.py, majors.py, and planner.py. We will go through each file and discuss the comments provided by Uriel.

Students.py

The Students.py file contains the StudentBase class, which is used to create a student object. Uriel has provided four comments for this file.

1. Adding Constraints to StudentBase

Uriel suggests adding constraints to the StudentBase class to ensure that the first, last, and email fields are valid. The constraints should include a minimum and maximum length for the names, and a requirement for the email field to contain an '@' symbol. This will prevent users from creating students with invalid information.

class StudentBase:
    def __init__(self, first, last, email):
        self.first = first
        self.last = last
        self.email = email

    # Add constraints to first, last, and email fields
    def validate(self):
        if len(self.first) < 2 or len(self.first) > 20:
            raise ValueError("First name must be between 2 and 20 characters")
        if len(self.last) < 2 or len(self.last) > 20:
            raise ValueError("Last name must be between 2 and 20 characters")
        if '@' not in self.email:
            raise ValueError("Email must contain an '@' symbol")

2. Adding Constraints to CompletedCourse

Uriel suggests adding constraints to the CompletedCourse class to ensure that the grade and quarter_taken fields are valid. The grade field should only accept the following values: A, B, C, D, F, P, NP, W. The quarter_taken field should only accept the following values: Fall, Spring, Winter, Summer. This will prevent users from creating completed courses with invalid information.

class CompletedCourse:
    def __init__(self, grade, quarter_taken):
        self.grade = grade
        self.quarter_taken = quarter_taken

    # Add constraints to grade and quarter_taken fields
    def validate(self):
        if self.grade not in ['A', 'B', 'C', 'D', 'F', 'P', 'NP', 'W']:
            raise ValueError("Invalid grade")
        if self.quarter_taken not in ['Fall', 'Spring', 'Winter', 'Summer']:
            raise ValueError("Invalid quarter")

3. Renaming Username to Email in Login

Uriel suggests renaming the username field in the login function to email. This is because the username field is actually the email address, and renaming it will make the code more clear and easier to understand.

def login(email, password):
    # Rename username to email
    return User(email, password)

4. Separating get_student into Multiple Functions

Uriel suggests separating the get_student function into multiple functions to make the code more clear and easier to understand. The get_student function currently returns the student's information, completed courses, and planned courses. Separating it into multiple functions will make it easier to manage and maintain the code.

def get_info(student_id):
    # Return student's information
    return Student.get(student_id)

def get_completed_courses(student_id):
    # Return completed courses
    return CompletedCourse.get_completed_courses(student_id)

def get_planned_courses(student_id):
    # Return planned courses
    return PlannedCourse.get_planned_courses(student_id)

Courses.py

The Courses.py file contains the get_major_courses function, which is used to retrieve the major courses for a given student. Uriel has provided one comment for this file.

5. Removing Redundant Major Check

Uriel suggests removing the redundant major check in the get_major_courses function. The major check is currently done twice, once in the function and once in the query. Removing the redundant check will make the code more efficient and easier to understand.

def get_major_courses(student_id):
    # Remove redundant major check
    return Course.get_major_courses(student_id)

majors.py

The majors.py file contains the get_major function, which is used to retrieve the major for a given student. Uriel has provided two comments for this file.

6. Removing Redundant get_major Function

Uriel suggests removing the redundant get_major function. Since there are only three majors, retrieving one independent major will not make a difference. Removing the function will make the code more efficient and easier to understand.

def get_major(student_id):
    # Remove redundant get_major function
    return Major.get_major(student_id)

7. Using a Loop to Fetch Students

Uriel suggests using a loop to fetch students in the get_major_student function. Instead of using the fetchall method, which returns all students at once, using a loop will make the code more efficient and easier to understand.

def get_major_student(major_id):
    # Use a loop to fetch students
    students = []
    for student in Student.query.filter_by(major_id=major_id):
        students.append(Student(student.id))
    return students

planner.py

The planner.py file contains the create_course_plan function, which is used to create a course plan for a given student. Uriel has provided three comments for this file.

8. Adding Constraints to Classes

Uriel suggests adding constraints to the classes in the planner.py file, similar to the constraints added in the students.py file. This will ensure that the classes are valid and prevent users from creating invalid course plans.

class CoursePlan:
    def __init__(self, student_id, course_id):
        self.student_id = student_id
        self.course_id = course_id

    # Add constraints to classes
    def validate(self):
        if not Course.exists(self.course_id):
            raise ValueError("Invalid course")

9. Removing Unnecessary int = 1

Uriel suggests removing the unnecessary int = 1 from the create_course_plan function. This is because the function already checks if the student exists, and adding the int = 1 will not make a difference.

def create_course_plan(student_id, course_id):
    # Remove unnecessary int = 1
    return CoursePlan(student_id, course_id)

10 Using a List to Store Quarters

Uriel suggests using a list to store the quarters in the planner.py file, instead of hardcoding them. This will make the code more flexible and easier to maintain.

quarters = ['Fall', 'Spring', 'Winter', 'Summer']

In this article, we will be discussing the code review comments provided by Uriel for the given Python code. We will go through each comment and provide a Q&A section to clarify any doubts or questions that may arise.

Students.py

1. Adding Constraints to StudentBase

Q: What are the constraints that Uriel suggests adding to the StudentBase class? A: Uriel suggests adding constraints to the StudentBase class to ensure that the first, last, and email fields are valid. The constraints should include a minimum and maximum length for the names, and a requirement for the email field to contain an '@' symbol.

Q: Why is it important to add constraints to the StudentBase class? A: Adding constraints to the StudentBase class will prevent users from creating students with invalid information, which can lead to errors and inconsistencies in the data.

2. Adding Constraints to CompletedCourse

Q: What are the constraints that Uriel suggests adding to the CompletedCourse class? A: Uriel suggests adding constraints to the CompletedCourse class to ensure that the grade and quarter_taken fields are valid. The grade field should only accept the following values: A, B, C, D, F, P, NP, W. The quarter_taken field should only accept the following values: Fall, Spring, Winter, Summer.

Q: Why is it important to add constraints to the CompletedCourse class? A: Adding constraints to the CompletedCourse class will prevent users from creating completed courses with invalid information, which can lead to errors and inconsistencies in the data.

3. Renaming Username to Email in Login

Q: Why does Uriel suggest renaming the username field in the login function to email? A: Uriel suggests renaming the username field in the login function to email because the username field is actually the email address, and renaming it will make the code more clear and easier to understand.

Q: How will renaming the username field to email affect the code? A: Renaming the username field to email will make the code more consistent and easier to understand, as the username field will now accurately reflect its purpose.

4. Separating get_student into Multiple Functions

Q: Why does Uriel suggest separating the get_student function into multiple functions? A: Uriel suggests separating the get_student function into multiple functions to make the code more clear and easier to understand. The get_student function currently returns the student's information, completed courses, and planned courses, which can make the code more complex and harder to manage.

Q: How will separating the get_student function into multiple functions affect the code? A: Separating the get_student function into multiple functions will make the code more modular and easier to understand, as each function will have a specific purpose and will be easier to manage.

Courses.py

5. Removing Redundant Major Check

Q: Why does Uriel suggest removing the redundant major check in the get_major_courses function? A: Uriel suggests removing the redundant major check in the get_major_courses function because it is not necessary and can make the code more complex and harder to understand.

Q: How will removing the redundant check affect the code? A: Removing the redundant major check will make the code more efficient and easier to understand, as it will eliminate unnecessary complexity and make the code more modular.

majors.py

6. Removing Redundant get_major Function

Q: Why does Uriel suggest removing the redundant get_major function? A: Uriel suggests removing the redundant get_major function because it is not necessary and can make the code more complex and harder to understand.

Q: How will removing the redundant get_major function affect the code? A: Removing the redundant get_major function will make the code more efficient and easier to understand, as it will eliminate unnecessary complexity and make the code more modular.

7. Using a Loop to Fetch Students

Q: Why does Uriel suggest using a loop to fetch students in the get_major_student function? A: Uriel suggests using a loop to fetch students in the get_major_student function because it is more efficient and easier to understand than using the fetchall method.

Q: How will using a loop to fetch students affect the code? A: Using a loop to fetch students will make the code more efficient and easier to understand, as it will eliminate unnecessary complexity and make the code more modular.

planner.py

8. Adding Constraints to Classes

Q: Why does Uriel suggest adding constraints to the classes in the planner.py file? A: Uriel suggests adding constraints to the classes in the planner.py file to ensure that the classes are valid and prevent users from creating invalid course plans.

Q: How will adding constraints to the classes affect the code? A: Adding constraints to the classes will make the code more robust and easier to understand, as it will prevent users from creating invalid course plans and make the code more modular.

9. Removing Unnecessary int = 1

Q: Why does Uriel suggest removing the unnecessary int = 1 from the create_course_plan function? A: Uriel suggests removing the unnecessary int = 1 from the create_course_plan function because it is not necessary and can make the code more complex and harder to understand.

Q: How will removing the unnecessary int = 1 affect the code? A: Removing the unnecessary int = 1 will make the code more efficient and easier to understand, as it will eliminate unnecessary complexity and make the code more modular.

10 Using a List to Store Quarters

Q: Why does Uriel suggest using a list to store the quarters in the planner.py file? A: Uriel suggests using a list to store the quarters in the planner.py file because it is more flexible and easier to understand than hardcoding the quarters.

Q: How will using a list to store the quarters affect the code? A: Using a list to store the quarters will make the code more flexible and easier to understand, as it will eliminate unnecessary complexity and make the code more modular.