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)
2
Part I: Getting to Know Python
10
PART II: Algorithms and Circuits
14
PART III: Advanced Features and Libraries
19
References
20
Other Books You May Enjoy
Appendices
Appendix C: The Complete UniPoly Class
Appendix D: The Complete Guitar Class Hierarchy
Appendix F: Production Notes

2.1 Numbers

The two most frequently used forms of numbers in Python are integers and floating-point. An integer contains no decimal point and can be negative, zero, or positive.

-4
-4
0
0
837375400388826538847463290993837000004846673
837375400388826538847463290993837000004846673

As you can see, integers can be quite large. Python uses the type int for integers. We’ll learn more about this later, but it’s common to say something like “-17 is an int.”

A floating-point number, known as a float, contains a decimal point but is sometimes limited in how much information the system retains from what you type or what is computed.

-3.6836
-3.6836
17.9817359935767429962445362777253636
17.98173599357674

Here we lost precision when we had too many digits to the right of the decimal point for Python to store. If there are...