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Learn Python by Building Data Science Applications

You're reading from   Learn Python by Building Data Science Applications A fun, project-based guide to learning Python 3 while building real-world apps

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Product type Paperback
Published in Aug 2019
Publisher Packt
ISBN-13 9781789535365
Length 482 pages
Edition 1st Edition
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Authors (2):
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Philipp Kats Philipp Kats
Author Profile Icon Philipp Kats
Philipp Kats
David Katz David Katz
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David Katz
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Table of Contents (26) Chapters Close

Preface 1. Section 1: Getting Started with Python
2. Preparing the Workspace FREE CHAPTER 3. First Steps in Coding - Variables and Data Types 4. Functions 5. Data Structures 6. Loops and Other Compound Statements 7. First Script – Geocoding with Web APIs 8. Scraping Data from the Web with Beautiful Soup 4 9. Simulation with Classes and Inheritance 10. Shell, Git, Conda, and More – at Your Command 11. Section 2: Hands-On with Data
12. Python for Data Applications 13. Data Cleaning and Manipulation 14. Data Exploration and Visualization 15. Training a Machine Learning Model 16. Improving Your Model – Pipelines and Experiments 17. Section 3: Moving to Production
18. Packaging and Testing with Poetry and PyTest 19. Data Pipelines with Luigi 20. Let's Build a Dashboard 21. Serving Models with a RESTful API 22. Serverless API Using Chalice 23. Best Practices and Python Performance 24. Assessments 25. Other Books You May Enjoy

Time

Another column is time. Now, pandas has a built-in DateTime parser and a very good one! Just use pd.to_datetime() on your scalar value or a collection. In this case, however, it won't work, and neither will any external packages that usually help (dateparser is our favorite). And all that because cells describe a time range, and not just one specific date.

Again, let's (at least, for now) see whether we can make our life simpler. Indeed, we probably don't care about specific dates—all we need is the month and year. Luckily, all months are properly stated and uniform—and pd.to_datetime can parse them. So, all we need is to correctly extract two month-year pairs from each.

Now, it seems hard to define one regular expression that will work here. Instead, we can try to get all years (we know all of them are four-digit numbers, starting with 19) and...

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