Declare in Python 3.10

To declare a class in Python 3.10 we use the class keyword followed by the name of the class and a colon. The code block following the colon contains the methods and attributes of the class.

Here is an example of declaring a simple class called Person:

class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age
def say_hello(self):

        print(f"Hello, my name is {self.name} and I am {self.age} years old.")
person = Person("John", 30)

person.say_hello() # output: "Hello, my name is John and I am 30 years old."

In this example, the Person class has an __init__ method which takes a name and age parameter and initializes the name and age instance variables. The say_hello method prints a greeting using the name and age instance variables.

We then create an instance of the class by calling the Person constructor with the arguments "John" and 30. We can then call the say_hello method on the person object. The output will be "Hello, my name is John and I am 30 years old.".