# 31-July
'''
Types Of methods in class
1. instance Method
2. Static Method
3. Class Method
'''
'''
# instance method ( object )
1. in instance method we pass or use 'self' variable
( 'self' is refer to invoking object )
2. In instance method we always write coding related to object
3. we can call instance method method using invoking object
# Ex: d1.getdata() 'd1' is invoking object
'''
'''
# Example of instance method
class Student:
def getdata(self): # instance method , here 'self' is refer to invoking obj
print("Enter Sno Sname and Marks")
self.sno = int(input())
self.sname= input()
self.m = int(input())
def showdata(self): # instance method ,
print(self.sno," ",self.sname," ",self.m)
#self: refer to invoking object
#main
s1 = Student() # creating object
s2 = Student() # creating object
s1.getdata() # s1 is invoking object
s2.getdata() # s2 is invoking object
s1.showdata()
s2.showdata()
'''
'''
# Eaxmple of instance method
class Student:
def __init__(self,n,m): # parameterized constructor
self.name = n
self.marks = m
def display(self): # instance method
print('Hi',self.name)
print('Your Marks are:',self.marks)
def grade(self): # instance method
#self.display() # Calling display() method for invoking obj
if self.marks>=60:
print('You got First Grade')
elif self.marks>=50:
print('Yout got Second Grade')
elif self.marks>=35:
print('You got Third Grade')
else:
print('You are Failed')
#main
n = int(input('Enter number of students:')) # 5 or 300
l_lst = [] # empty list
for i in range(n): # 'n' times
n1 = input('Enter Name:')
m1= int(input('Enter Marks:'))
s = Student(n1,m1) # creating object
l_lst.append(s)
print('RECORD OF ALL STUDENTS \n' )
for s1 in l_lst:
s1.display()
s1.grade()
'''
# Getter and Setter
# Getter : A instance method which is returning value of object
# Setter : A instance method which is Set the value of object
'''
# Example Of Getter and Setter
class Demo:
def setxy(self,a,b): # setter
self.x=a
self.y=b
def getxy(self): # getter
return self.x,self.y # returning multiple values
# main
d1 = Demo() # creating object
d1.setxy(10,20)
a,b=d1.getxy()
print(a,b) # O/P 10 20
'''
# 2. class Method
'''
• Inside of method implementation if we are using only class variables (static
variables),
then such type of methods we should declare as class method.
• We can declare class method explicitly by using @classmethod decorator.
• For class method we should provide 'cls' variable at the time of declaration
• We can call classmethod by using classname.
'''
'''
# Example of class method
class Student:
college = "SAM" # static variable
def __init__(self,n,m): # constructor
self.sname=n
self.marks=m
def display(self): # instance method
print(self.sname,self.marks)
@classmethod
def showCollege(cls): #class method
print(Student.college)
# main
s1 = Student("pranshu",244)
s2 = Student("Aakash",233)
s1.display()
Student.showCollege() # Calling class method
s2.display()
Student.showCollege() # Calling class method
'''
'''
# Program to track the number of objects created for a class:
# counting total no object in a program
class Test:
count=0 # static variable
def __init__(self):
Test.count = Test.count+1
print(Test.count , ' Object Is Created ')
self.x=10
@classmethod
def noOfObjects(cls):
print('The number of objects created for test class:',Test.count)
# print(self.x) # Error( Cant use instance variable )
Test.noOfObjects() # 0
t1=Test()
t2=Test()
Test.noOfObjects() # 2
t3=Test()
t4=Test()
t5=Test()
Test.noOfObjects() # 5
'''
