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Author: yadavsakshi6061

day5-oop's.py

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+"""OOP in python
+To map with real world scenarios, we started using objects in code.
+This is called object oriented programming
+Procedral - seq code
+function  - redundancy < , reusablity >
+oop       - we can also: redundancy < , reusablity >
+
+class  :1st we create class [ class is bluePrint for creathing objects ]
+object :"""
+
+#creating class
+class Student:
+    name = "Sakshi"
+
+s1 = Student()
+print(s1)   #op - <__main__.Student object at 0x0000014C58275850>
+print(s1.name) #Sakshi
+
+s2 = Student()
+print(s2.name) #Sakshi
+
+class Car:
+    color = "pink"
+    brand = "BMW"
+
+c1 = Car()
+print(c1.color)
+print(c1.brand)
+
+"""
+__init__ Function
+constructor  is called in every new obj
+All class have a function called __init__(),which is always executed 
+when the object is being initiated"""
+
+class Student2:
+    college_name ="jain" #when we know the value is comman , class attr
+    name = "anonymous" #class attr , when we have same name then obj attr is printed
+    #default  constructor
+    def __init__(self):
+        pass
+    #parameterzied constructor
+    def __init__(self,name,marks):  #we have to pass the self arrg
+        print("Adding new student database")
+        self.name = name
+        self.marks = marks
+
+
+#s3 = Student2() #<__main__.Student object at 0x000001C7E1C8B7A0>
+#print(s3) #<__main__.Student object at 0x000001C7E1C8B7A0>
+s3 = Student2("sakshi",89) #data is called attibutes
+print(s3.name,s3.marks)
+
+s4 = Student2("Nida",89)
+print(s4.name,s4.marks)
+
+print(s4.college_name) #jain
+print(Student2.college_name) #jain
+
+"""
+Methods
+class is colletion of data(attr) and methods
+Method are function that belongs to objects"""
+
+#ex for method
+class Student3:
+    college1_name ="jain"
+
+    #parameterzied constructor
+    def __init__(self,name1,marks1):  #we have to pass the self arrg        self.name1 = name1
+        self.name1 = name1
+        self.marks1 = marks1
+
+    def wlcm(self):
+        print("wlcm student",self.name1)
+
+    def get_marks(self):
+        return self.marks1
+
+
+s7 = Student3("sak",99)
+print(s7.name1,s7.marks1)
+s7.wlcm()  #calling the method
+print(Student3.get_marks1())
+
+#crete student class that takes name and marks of 3 sub as aruguments
+#in constructor then create a mentod to print the average
+
+
+
+class Std:
+    def __init__(self,name9,marks7):
+        self.name9 = name9
+        self.marks7 = marks7
+
+    def avg(self):
+        sum = 0
+        for val in self.marks7:
+            sum += val
+        print("hi",self.name9,sum/3)
+
+s5 =Std("sakshi",[99,98,97])
+s5.avg() #hi sakshi 98.0
+
+s5.name2 ="Sak"
+s5.avg() #hi Sak 98.0
+
+
+"""
+Static Methods
+methods that dont use the self parameter(work at class level)
+@staticmethod -> convert a function to be static methods 
+*when to use > This is comman for all class(obj)
+             > whn there is no use of class attr or instances attr 
+             EX: 
+             @staticmethod 
+             def start():
+                    print("str")
+"""
+
+class Hello:
+    @staticmethod #decorator
+    def hello():
+        print("hello")
+
+
+s0 =Hello()
+s0.hello()

day6-Abstraction&Encapsulation.py

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+"""
+Abstraction
+Hiding the implementation details of class and only
+showing the essential feature to the user
+"""
+class Car:
+    def __init__(self):
+        self.acc =False
+        self.brk =False
+        self.clutch = False
+
+    def start(self):
+        self.acc =True
+        self.acc =True
+        print("car started")
+
+car1 = Car()
+car1.start()
+"""
+Encapsulation
+Wrapping data and function into  single unit(obj)
+"""
+
+#practice
+"""
+create Account class with 2 attributes - balance and account no 
+create method for debit,credit and printing the balance 
+"""
+
+class Account:
+    balance = 5000
+    account_no = 123
+
+    def __init__(self):
+        pass
+
+    @staticmethod
+    def debit(): #sub
+        acc = int(input("Enter the debit amt:"))
+        Account.balance -= acc
+        print(f"Debited {acc} from account. Updated balance: {Account.balance}")
+
+
+    @staticmethod
+    def credit(): #add
+        acc= int(input("enter your  credit amount:"))
+        Account.balance += acc
+        print(f"Credited {acc} to account. Updated balance: {Account.balance}") #{} in python work as an place holder for var
+
+acc = Account()
+acc.debit()
+acc.credit()
+
+#other EX2
+
+class Acc:
+    def __init__(self,bal,acc_no):
+        self.bal = bal
+        self.acc_no = acc_no
+
+    def D(self,amt):
+        self.bal -= amt
+        print("the D amt is :",amt)
+        print("Total:",self.get_bal())
+
+
+    def C(self,amt):
+        self.bal+=amt
+        print("the C amm is :",amt)
+        print("Total:",self.get_bal())
+
+
+    def get_bal(self):
+        return self.bal
+
+
+acc1 = Acc(5000,1)
+acc1.D(1000)
+acc1.C(500)