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Learning Python with Raspberry Pi by Alex Bradbury, Ben Everard

Posted On March 23, 2017 at 3:37 am by / Comments Off on Learning Python with Raspberry Pi by Alex Bradbury, Ben Everard

By Alex Bradbury, Ben Everard

The must-have better half advisor to the Raspberry Pi person Guide!

Raspberry Pi selected Python as its instructing language of option to inspire a brand new new release of programmers to benefit tips to application. This approachable e-book serves as an awesome source for someone desirous to use Raspberry Pi to profit to software and is helping you start with the Python programming language. aimed toward first-time builders without past programming language assumed, this newbie publication will get you up and running.

Covers variables, loops, and functions
Addresses 3D pics programming
Walks you thru programming Minecraft
Zeroes in on Python for scripting
Learning Python with Raspberry Pi proves itself to be an attractive creation to coding.

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If the condition in the elif is false, then Python moves on to the else. If it gets this far (that is, if the conditions for the if and elif are both false), Python will execute the code. else doesn’t have a condition. Figure 2-3 shows the flow of this logic. Start Is the colour red? Yes Set the colour orange Yes Set the colour yellow No Is the colour orange? No Set the colour red Figure 2-3: The flow of conditional logic for determining the colour of each flower petal. 19 20 LEARNING PYTHON WITH RASPBERRY PI This if clause then, will alternate the colour of the pen after each petal is drawn.

We’ll look at how to fix that shortly, but first we’ll take a look at a different type of loop. Moving Through Data with for Loops for loops are used to move through pieces of data, and perform the instructions in the loop on each piece of data in turn. These are commonly used with range(x,y), which moves through every number between x and y. For example, you can calculate the 12 times table with: >>> for i in range(1,13): print(i, " times twelve is ", i*12) range() can take another parameter that sets the gap between two numbers.

The difference between lists and tuples comes when you try to update them: >>> list_1[1]=99 >>> list_1 [1, 99, 3, 4] >>> tuple_1[1]=99 Traceback (most recent call last): File "", line 1, in t1[1]=99 TypeError: 'tuple' object does not support item assignment As you can see, you can update an item in a list, but not in a tuple. However, whilst you can’t update a tuple, you can simply overwrite the lot. In this case, you’re simply telling Python to point the variable tuple_1 to a new tuple and discard the old one.

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