An example in Python

While we will go into more depth regarding how asynchronous programming can be implemented in Python and the main tools we will be using, including the asyncio module, let's consider how asynchronous programming can improve the execution time of our Python programs.

Let's take a look at the Chapter16/example1.py file:

# Chapter16/example1.py

from math import sqrt

def is_prime(x):
    print('Processing %i...' % x)

    if x < 2:
        print('%i is not a prime number.' % x)

    elif x == 2:
        print('%i is a prime number.' % x)

    elif x % 2 == 0:
        print('%i is not a prime number.' % x)

    else:
        limit = int(sqrt(x)) + 1
        for i in range(3, limit, 2):
            if x % i == 0:
                print('%i is not a prime number.' % x)
                return

        print('%i is a prime number.' % x)

if __name__ == '__main__':

    is_prime(9637529763296797)
    is_prime(427920331)
    is_prime(157)

Here, we have our familiar prime-checking...