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Learn Python Programming, 3rd edition - Third Edition

You're reading from  Learn Python Programming, 3rd edition - Third Edition

Product type Book
Published in Oct 2021
Publisher Packt
ISBN-13 9781801815093
Pages 554 pages
Edition 3rd Edition
Languages
Authors (2):
Fabrizio Romano Fabrizio Romano
Profile icon Fabrizio Romano
Heinrich Kruger Heinrich Kruger
Profile icon Heinrich Kruger
View More author details

Table of Contents (18) Chapters

Preface 1. A Gentle Introduction to Python 2. Built-In Data Types 3. Conditionals and Iteration 4. Functions, the Building Blocks of Code 5. Comprehensions and Generators 6. OOP, Decorators, and Iterators 7. Exceptions and Context Managers 8. Files and Data Persistence 9. Cryptography and Tokens 10. Testing 11. Debugging and Profiling 12. GUIs and Scripting 13. Data Science in Brief 14. Introduction to API Development 15. Packaging Python Applications 16. Other Books You May Enjoy
17. Index

Importing objects

Now that we know a lot about functions, let's look at how to use them. The whole point of writing functions is to be able to reuse them later, and in Python, this translates to importing them into the namespace where you need them. There are many different ways to import objects into a namespace, but the most common ones are import module_name and from module_name import function_name. Of course, these are quite simplistic examples, but bear with us for the time being.

The import module_name form finds the module_name module and defines a name for it in the local namespace, where the import statement is executed. The from module_name import identifier form is a little bit more complicated than that but basically does the same thing. It finds module_name and searches for an attribute (or a submodule) and stores a reference to identifier in the local namespace. Both forms have the option to change the name of the imported object using the as clause:

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