Added punctuation and completed step 5: list operations

Author: coding-cryptid

students.py

@@ -1,32 +1,29 @@
-# Define the Student class
-from enum import unique
-
-
+# Defined the Student class.
 class Student:
     def __init__ (self, name, email, grades):
         self.name = name
         self.email = email
         self.grades = grades
 
     # Methods for the Student class
-    # Add a grade to the student's list of grades
+    # Add a grade to the student's list of grades.
     def add_grade(self, grade):
         self.grades.append(grade)
 
-    # Calculate the average grade for the student
+    # Calculate the average grade for the student.
     def average_grade(self):
         if len(self.grades) == 0:
             return 0
         return sum(self.grades) / len(self.grades)
 
-    # Display information about the student
+    # Display information about the student.
     def display_info(self):
         print(f"Name: {self.name}")
         print(f"Email: {self.email}")
         print(f"Grades: {self.grades}")
         print(f"Average Grade: {self.average_grade()}")
 
-    # Return grades as a tuple and demonstrate immutability using try-except block
+    # Return grades as a tuple and demonstrate immutability using try-except block.
     def grades_tuple(self):
         return tuple(self.grades)
     try:
@@ -37,33 +34,43 @@ def grades_tuple(self):
 
 
 
-# Created student objects with their name, email, and list of initial grades
+# Created student objects with their name, email, and list of initial grades.
 student1 = Student('John', 'jbschoolname@gmail.com', [85, 90, 78])
 student2 = Student('Jane', 'jaschoolname@gmail.com', [92, 88, 87])
 student3 = Student('Tim', 'tdscoolname@gmail.com', [90, 95, 100])
 
-# Add a new grade for each student
+# Add a new grade for each student.
 student1.add_grade(82)
 student2.add_grade(95)
 student3.add_grade(98)
 
-# Display information about each student
+# Display information about each student.
 student1.display_info()
 student2.display_info()
 student3.display_info()
 
-# Create a dictionary to store students by their email for easy access
+# Create a dictionary to store students by their email for easy access.
 student_dict = {
     student1.email: student1,
     student2.email: student2,
     student3.email: student3
 }
 
-# Retrieve a student by their email
+# Retrieve a student by their email.
 def get_student_by_email(email):
     return student_dict.get(email)
 
 # Unique grades for all students
 def unique_grades(student1, student2, student3):
     unique = {(set(student1.grades)).symmetric_difference(set(student2.grades)).symmetric_difference(set(student3.grades))}
-    print(unique)
+    print(unique)
+
+# Removed each students last grade using pop().
+student1.grades.pop()
+student2.grades.pop()
+student3.grades.pop()
+
+# Prints first and last grade for each student and the total number of grades. 
+for student in [student1, student2, student3]:
+    print(student.grades[0], student.grades[-1])
+    print(len(student.grades))