Python का इतिहास और विशेषताएँ

# Created by Guido van Rossum, first released in 1991
# Named after the comedy troupe Monty Python, not the snake
print("Python: born 1991, named after Monty Python")

x = 5
print(x)
# Change the value above and rerun -- no compile step needed
x = 10
print(x)

x = 5  # x starts out as an integer
print(type(x))  # shows <class 'int'>
x = "hello"  # same variable is reassigned to a string
print(type(x))  # shows <class 'str'>, proving Python is dynamically typed

class Dog:  # define a Dog class
    def __init__(self, name):  # constructor runs when a new Dog is created
        self.name = name  # store the dog's name on the instance

    def bark(self):  # method that prints a bark message
        print(self.name, "says woof")

Dog("Rex").bark()  # create a Dog named Rex and call its bark method

import json  # module to convert Python objects to JSON text
import math  # module with math constants and functions
data = json.dumps({"pi": math.pi})  # convert a dict containing pi to a JSON string
print(data)