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

10.4 Looking for orphan code

You have not thoroughly tested your code if you have not executed each line at least once. Checking for this is called coverage testing, and coverage is the tool to use. Install coverage from the operating system command line via

pip install coverage

Suppose I have the function plane_location, which accepts two arguments: the x coordinate of a point in the plane and the y coordinate. The function prints whether the point is

  • at the origin (0, 0)
  • on the x-axis (if y = 0)
  • on the y-axis (if x = 0)
  • in the first quadrant (if x and y > 0)
  • in the second quadrant (if x < 0 and y > 0)
  • in the third quadrant (if x < 0 and y < 0)
  • in the fourth quadrant (if x > 0 and y < 0)

The implementation is straightforward, and I follow it with some examples:

def plane_location(x, y):
    if x == 0:
        if y == 0: