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Class methods = Allow operations related to the class itself
Take (cls) as the first parameter, which represents the class itself.

Instance methods = Best for operations on instances of the class (objects)
Static methods = Best for utility functions that do not need access to class data
Class methods = Best for class-level data or require access to the class itself

class Student:

count = 0
total_gpa = 0

def __init__(self, name, gpa):
self.name = name
self.gpa = gpa
Student.count += 1
Student.total_gpa += gpa

#INSTANCE METHOD
def get_info(self):
return f"{self.name} {self.gpa}"

@classmethod
def get_count(cls):
return f"Total # of students: {cls.count}"

@classmethod
def get_average_gpa(cls):
if cls.count == 0:
return 0
else:
return f"Average gpa: {cls.total_gpa / cls.count:.2f}"

student1 = Student("Spongebob", 3.2)
student2 = Student("Patrick", 2.0)
student3 = Student("Sandy", 4.0)

print(Student.get_count())
print(Student.get_average_gpa())