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Getting Started with Python and Raspberry Pi (Redirected from Learning Python By Developing Raspberry Pi Applications)

You're reading from   Getting Started with Python and Raspberry Pi (Redirected from Learning Python By Developing Raspberry Pi Applications) Learn to design and implement reliable Python applications on the Raspberry Pi using a range of external libraries, the Raspberry Pis GPIO port, and the camera module

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Product type Paperback
Published in Sep 2015
Publisher
ISBN-13 9781783551590
Length 200 pages
Edition 1st Edition
Languages
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Author (1):
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Dan Nixon Dan Nixon
Author Profile Icon Dan Nixon
Dan Nixon
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Table of Contents (13) Chapters Close

Preface 1. Your First Steps with Python on the Pi FREE CHAPTER 2. Understanding Control Flow and Data Types 3. Working with Data Structures and I/O 4. Understanding Object-oriented Programming and Threading 5. Packaging Code with setuptools 6. Accessing the GPIO Pins 7. Using the Camera Module 8. Extracting Data from the Internet 9. Creating Command-line Interfaces 10. Debugging Applications with PDB and Log Files 11. Designing Your GUI with Qt Index

Using packages in your Python code


We will first have a look at the ways in which third party code and libraries can be downloaded, installed, and included in the Python scripts and application we write.

Importing modules

As we have already seen in several of the examples used so far, Python libraries (modules) are used in code by importing them using the import statement. However, so far, we have only been importing the entire modules. For example, import threading imports the entire threading module and to use, say, the Thread class, you would have to specify it as threading.Thread.

Python also allows you to import single classes, and even functions, using a slightly modified syntax, as shown next:

from threading import Thread
from time import time

This preceding code imports just the Thread class and the time function from the threading and time modules respectively. Now when you want to use either within the rest of the file, you would only need to specify either Thread or time, rather than...

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