Book Image

Dancing with Python

By : Robert S. Sutor
Book Image

Dancing with Python

By: Robert S. Sutor

Overview of this book

Dancing with Python helps you learn Python and quantum computing in a practical way. It will help you explore how to work with numbers, strings, collections, iterators, and files. The book goes beyond functions and classes and teaches you to use Python and Qiskit to create gates and circuits for classical and quantum computing. Learn how quantum extends traditional techniques using the Grover Search Algorithm and the code that implements it. Dive into some advanced and widely used applications of Python and revisit strings with more sophisticated tools, such as regular expressions and basic natural language processing (NLP). The final chapters introduce you to data analysis, visualizations, and supervised and unsupervised machine learning. By the end of the book, you will be proficient in programming the latest and most powerful quantum computers, the Pythonic way.
Table of Contents (29 chapters)
Part I: Getting to Know Python
PART II: Algorithms and Circuits
PART III: Advanced Features and Libraries
Other Books You May Enjoy
Appendix C: The Complete UniPoly Class
Appendix D: The Complete Guitar Class Hierarchy
Appendix F: Production Notes

6.1 The basic form

A minimal function definition is

def f():

This definition begins with the def keyword. Then comes the name of the function, f, an open-close parentheses pair, and a colon, “:”. The next line is indented and begins the function body. Here it is pass.

We use pass where we must include an action but do not have anything useful to do. Think of it as saying, “look how I am drawing attention to not doing anything.” For example, I can use pass in a conditional statement to indicate that I am aware of a processing option and choose to do nothing. You may use three periods, “...”, instead of pass.

Starting from this minimal form, we begin to add and use additional Python features. The function body can be any collection of expressions we want to package together and call repeatedly. Let’s define a function that...