Python is an object oriented programming language.

Almost everything in Python is an object, with its properties and methods.

What is a class?

Objects are an encapsulation of variables and functions into a single entity

class human:
  name=None

class human:
  name=None

person0=human()
person0.name='kasra'

class human:
  name=None
  def sayHello(self):
    print(f"hello ma friend :)\nMy name is {self.name} I am very polit \U0001F60C\n")

person0=human()
person0.name='kasra'
person0.sayHello()

class human:
  name=None
  def __init__(self):
    print("i am new born!!")
  def sayHello(self):
    print(f"hello ma friend :)\nMy name is {self.name} I am very polit \U0001F60C\n")

person0=human()
print("name changed!")
person0.name='kasra'
person0.sayHello()

Question: write a function to change the name

init function can have arguments...

class human:
  name=None
  def __init__(self,name):
    print("i am new born!!")
    self.name=name
  def sayHello(self):
    print(f"hello ma friend :)\nMy name is {self.name} I am very polit \U0001F60C\n")

person0=human('kasra')
person0.sayHello()

Try to make several objects from one function and see the variables namespace

Question: Create a class, in which it has this functionallities:

• this class can be Instantiate by a list
• make a method , whenever the method is called it should return next object

Question think a pile of numbers that we should check whether they are in the Fibonacci series or not.(fisrt most of numbers are duplicated, second make it fast)

docs for special functions

• __lt__(self, other)

• __le__(self, other)

• __eq__(self, other)

• __ne__(self, other)

• __gt__(self, other)

• __ge__(self, other)

• __getitem__(self, key)

• __setitem__(self, key, value)

• __contains__(self, item)

• __add__(self, other) ==> +

• __sub__(self, other) ==> -

• __mul__(self, other) ==> *

• __matmul__(self, other) ==> @

ptyhonDoc says The @ (at) operator is intended to be used for matrix multiplication. No builtin Python types implement this operator.

• __truediv__(self, other) ==> /

• __floordiv__(self, other) ==> //

• __mod__(self, other) ==> %

• __pow__(self, other[, modulo]) ==> **

• __lshift__(self, other) ==> <<

• __rshift__(self, other) ==> >>

• __and__(self, other) ==> &

• __xor__(self, other)¶ ==> ^

• __or__(self, other) ==> |

• __radd__(self, other)

• __rsub__(self, other)

• __rmul__(self, other)

• __rmatmul__(self, other)

• __rtruediv__(self, other)

• __rfloordiv__(self, other)

• __rmod__(self, other)

• __rpow__(self, other)

• __rlshift__(self, other)

• __rrshift__(self, other)

• __rand__(self, other)

• __rxor__(self, other)

• __ror__(self, other)¶

• __iadd__(self, other) ==> +=

• __isub__(self, other) ==> -=

• __imul__(self, other) ==> *=

• __imatmul__(self, other) ==> @=

• __itruediv__(self, other) ==> /=

• __ifloordiv__(self, other) ==> //=

• __imod__(self, other) ==> %=

• __ipow__(self, other[, modulo]) ==> **=

• __ilshift__(self, other) ==> <<=

• __irshift__(self, other) ==> >>=

• __iand__(self, other) ==> &=

• __ixor__(self, other) ==> ^=

• __ior__(self, other) ==> |=

• __str__(self)

• __len__(self)