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

7.9 Enumerations

Bob’s Bakery Bistro makes and sells four kinds of cookies: chocolate, sugar, oatmeal, and shortbread. Bob hires ace coder Will to write a new cookie inventory application for the bistro using Python.

How should Will represent the cookies? One way is to use global constants.

CHOCOLATE_COOKIE = 0
SUGAR_COOKIE = 1
OATMEAL_COOKIE = 2
SHORTBREAD_COOKIE = 3

COOKIE_NAMES = [
    "chocolate",
    "sugar",
    "oatmeal",
    "shortbread"
]

It’s easy to get the name if you have the cookie constant:

COOKIE_NAMES[SUGAR_COOKIE]
'sugar'

It’s less obvious how to go from the name to the cookie constant unless we make some assumptions about positions and indices. You can easily introduce bugs into your code if you start adding more kinds of cookies.

It would be nice to have a simpler and class-oriented way of doing this in Python. This...