Getting Started with Python and Raspberry Pi by Dan Nixon

By Dan Nixon

This publication is designed when you are unusual with the paintings of Python improvement and wish to get to grasp their approach around the language and the numerous extra libraries that let you get an entire program up and operating in no time.
Learn to layout and enforce trustworthy Python purposes at the Raspberry Pi utilizing more than a few exterior libraries, the Raspberry Pis GPIO port, and the digicam module

About This Book

Learn the basics of Python scring and alertness programming
Design simple command-line and graphical consumer interfaces
A step by step advisor to studying Python programming with the Pi

What you'll Learn

Fundamentals of Python applications
Designing functions for multi-threading
Interacting with electronics and actual devices
Debugging purposes once they cross wrong
Packaging and fitting Python modules
User interface layout utilizing Qt
Building effortless to take advantage of command-line interfaces
Connecting functions to the Internet

In Detail

The Raspberry Pi is likely one of the smallest and such a lot cheap unmarried board desktops that has taken over the area of pastime electronics and programming, and the Python programming language makes this the correct platform to begin coding with.

The publication will commence with a short creation to Raspberry Pi and Python. we are going to direct you to the professional documentation that is helping you put up your Raspberry Pi with the mandatory apparatus corresponding to the visual display unit, keyboard, mouse, energy provide, and so forth. it's going to then dive correct into the fundamentals of Python programming. Later, it is going to specialise in different Python projects, for example, interfacing with undefined, GUI programming, and extra. when you get better versed with the elemental programming, the ebook will then educate you to enhance Python/Raspberry Pi applications.

By the top of this publication, it is possible for you to to enhance Raspberry Pi functions with Python and should have sturdy figuring out of Python programming for Raspberry Pi.

Style and approach

An easy-to-follow creation to Python scring and alertness improvement via transparent conceptual causes subsidized up via real-world examples at the Raspberry Pi.

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If you have a long string that you have to generate, you no longer have to worry about slipping end-of-line characters, such as \\n or \\r\\n, into all your strings to make them wrap; instead, you can simply use triple quotes, such as in this XML snippet. This is because the string format operator is just that— an operator—and so it’s possible to define a format string in one part of your code, and fill it out with the operator and tuple of arguments later on. Although lists enable their values to be changed and have methods that do so, tuples are immutable, meaning you cannot change their values—and, partly because of this, they do not have methods.

Variables can be thought of as names that refer to otherwise anonymous objects, which contain the actual values involved—and thus, any given variable can have its value altered at any time, like so >>> foo = 'bar' >>> foo 'bar' >>> foo = 1 >>> foo 1 Python Standard Types In this example, the variable foo is mapped to a string object, 'bar', but is then remapped to an integer object, 1. ). Because you can remap variable names like this, you are never really 100 percent sure what type of object a variable is pointing to at any given time, unless you ask the interpreter for more information.

Perform the same get call but with success this time. 7. Iterate through the dictionary and display each key-value pair. Let’s take things slightly out-of-turn. ), and it is this (lack of) ordering of keys that enables hashes to be very quick in the lookup of values. Alternately, you can use square-bracket notation, similar to retrieving a single element of a sequence, d['pub']. The get method is safer as it always returns a value instead of raising an error. There’s another, even more powerful method called setdefault.

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