num1 = 1
num2 = 2
print(num1 + num2)

str1 = "Python"
str2 = "Programming"
print(str1+" "+str2)

print(len("Programiz"))
print(len(["Python", "Java", "C"]))
print(len({"Name": "John", "Address": "Nepal"}))

9
3
2

class Cat:
    def __init__(self, name, age):
        self.name = name
        self.age = age
    def info(self):
        print(f"I am a cat. My name is {self.name}. I am {self.age} years old.")
    def make_sound(self):
        print("Meow")
class Dog:
    def __init__(self, name, age):
        self.name = name
        self.age = age
    def info(self):
        print(f"I am a dog. My name is {self.name}. I am {self.age} years old.")
    def make_sound(self):
        print("Bark")
cat1 = Cat("Kitty", 2.5)
dog1 = Dog("Fluffy", 4)
for animal in (cat1, dog1):
    animal.make_sound()
    animal.info()
    animal.make_sound()

Meow
I am a cat. My name is Kitty. I am 2.5 years old.
Meow
Bark
I am a dog. My name is Fluffy. I am 4 years old.
Bark

from math import pi
class Shape:
    def __init__(self, name):
        self.name = name
    def area(self):
        pass
    def fact(self):
        return "I am a two-dimensional shape."
    def __str__(self):
        return self.name
class Square(Shape):
    def __init__(self, length):
        super().__init__("Square")
        self.length = length
    def area(self):
        return self.length**2
    def fact(self):
        return "Squares have each angle equal to 90 degrees."
class Circle(Shape):
    def __init__(self, radius):
        super().__init__("Circle")
        self.radius = radius
    def area(self):
        return pi*self.radius**2
a = Square(4)
b = Circle(7)
print(b)
print(b.fact())
print(a.fact())
print(b.area())

Circle
I am a two-dimensional shape.
Squares have each angle equal to 90 degrees.
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