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<h2 id="Editor"> The Editor</h2>
<p>The Python editor is perfect for those who want to push their coding skills further.
A selection of snippets and a range of pre-made images, sounds and music give you a helping hand with your code.
The editor is powered by the global <a href="http://akroncuttingedge.com/pFad/index.php?u=http%3A%2F%2Fpython.org%2Fcommunity%2Fmicrobit%2F">Python Community</a>.</p>
<h3 id="Menu">Menu</h3>
<p>The main menu of the editor contains various buttons that allow you to interact with the editor and the micro:bit device.
If you have additional features enabled in the editor, for example WebUSB you may see extra buttons availble in this menu.
</p>
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alt="A picture of the buttons along the top of the editor."/></p>
<p>As well as using a mouse, you can use the <kbd>TAB</kbd> key to navigate through the options and <kbd>Enter</kbd> to activate them. If you're in the text editor, The <kbd>ESC</kbd> key will re-focus on the menu.
</p>
<table class="table">
<tr>
<td>
<div id="command-download" class="roundsymbol" title="Download a hex file to flash onto micro:bit" style="font-size: 0rem;">
<svg class="svg svg-icon-touchdevelop" viewBox="-65 -195 600 560" xmlns="http://www.w3.org/2000/svg" role="presentation" aria-label="download">
<path style="fill:currentColor" d="M 263.56055 85.527344 C 260.33084 85.527344 257.52094 86.703234 255.17188 89.052734 C 252.82703 91.402114 251.64648 94.171095 251.64648 97.443359 L 251.64648 196.47852 L 204.15625 196.47852 C 198.91034 196.47852 195.26214 198.91285 193.24805 203.86328 C 191.15075 208.64601 191.98831 212.96744 195.76367 216.78516 L 279 300.02148 C 281.26585 302.37055 284.03557 303.54492 287.39062 303.54492 C 290.74779 303.54492 293.55753 302.37097 295.78125 300.02148 L 379.01758 216.78516 C 382.83508 212.96744 383.67264 208.64601 381.5332 203.86328 C 379.43589 198.91285 375.78648 196.47852 370.62695 196.47852 L 322.9668 196.47852 L 322.9668 97.443359 C 322.9668 94.171095 321.79138 91.402114 319.44336 89.052734 C 317.09324 86.703664 314.36825 85.527344 311.2207 85.527344 L 263.56055 85.527344 z M 147.00977 325.93359 C 122.43373 325.93359 102.01367 346.35343 102.01367 370.92969 L 102.01367 485.02539 L 102.01367 533.8418 C 106.67645 537.02937 111.53648 540.0315 117.85352 543.27539 C 125.69502 547.30212 133.72502 550.98418 141.88672 554.375 L 141.88672 503.26758 C 142.13384 503.31793 142.37748 503.37863 142.625 503.42773 L 142.625 370.92969 C 142.625 368.15042 144.22954 366.54492 147.00977 366.54492 L 338.31836 366.54492 L 338.31836 440.40039 A 17.32053 17.32053 0 0 0 355.63672 457.71875 L 434.35742 457.71875 L 434.35742 505.38281 L 434.35742 544.47266 C 434.94611 544.50003 435.5454 544.55897 436.16016 544.67188 C 444.60421 539.7568 453.0889 534.87849 462.3457 532.17578 C 464.59305 528.90954 467.69044 525.85752 469.02148 526.13477 C 469.12344 526.03495 469.21763 525.92727 469.32227 525.83008 C 470.61587 524.62853 472.14616 523.71166 473.55859 522.65234 C 473.78412 522.4832 474.00802 522.32975 474.23047 522.18164 L 474.23047 488.62891 C 474.47633 488.42723 474.72448 488.22936 474.96875 488.02539 L 474.96875 411.05664 L 385.41016 325.93359 L 147.00977 325.93359 z M 372.95508 370.125 L 428.67188 423.08203 L 372.95508 423.08203 L 372.95508 370.125 z M 464.20898 531.06836 C 464.08361 531.17564 463.9982 531.24416 463.86523 531.35742 C 463.87243 531.37979 463.87759 531.39952 463.88477 531.42188 C 463.99369 531.30471 464.09943 531.18494 464.20898 531.06836 z M 102.01367 581.28906 L 102.01367 581.64648 C 102.4696 581.78262 102.92471 581.92257 103.38477 582.04492 C 102.90568 581.80305 102.45056 581.54997 102.01367 581.28906 z M 434.35742 645.00586 L 434.35742 645.67969 C 434.47063 645.45594 434.52799 645.338 434.63867 645.11914 C 434.54924 645.08804 434.44879 645.03984 434.35742 645.00586 z M 437.19922 689.88672 C 436.89094 690.57316 436.53127 691.63258 436.33203 692.27539 C 436.36068 692.24412 436.38938 692.21296 436.41797 692.18164 C 436.56296 691.77761 436.86786 690.87363 437.19922 689.88672 z " transform="translate(-47,-192)" id="path4173"></path> </svg>
</div>
</td>
<td>
Click on the <strong>Download</strong> button to save a special "hex" file on
computer. Plug in BBC micro:bit (it'll show up as USB
storage) and drag the newly saved file onto the device. Code
will run (or you'll see an error message scroll past on the
device's display). See below for how to extract code from a
hex file back into the editor.<br><br>
<strong>Download becomes 'Flash' when connected over <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor%2Fraw%2Frefs%2Fheads%2Fmaster%2F%23command-connect">WebUSB</a></strong>
</td>
</tr>
<tr>
<td>
<div id="command-connect" class="roundsymbol" title="Connect to the micro:bit via WebUSB" style="font-size: 0rem;">
<svg class="svg svg-icon-touchdevelop" viewBox="15 10 425 380" xmlns="http://www.w3.org/2000/svg" role="presentation" aria-label="connect">
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</div>
</td>
<td>
The <strong>Connect</strong> button allows you to connect to your micro:bit in your browser, using a tool called <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor%2Fraw%2Frefs%2Fheads%2Fmaster%2F%23WebUSB">WebUSB</a>.
When you choose to connect, a window will pop up in your browser asking you to choose the micro:bit, you want to connect to.
If you see the message 'no compatible devices found', you may need to <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fmicrobit.org%2Fguide%2Ffirmware">update the micro:bit firmware.</a>
When you are connected you will see this menu item change to 'Disconnect'.
</td>
</tr>
<tr>
<td>
<div id="command-files" class="roundsymbol" title="Load or Save files on your computer">
<svg class="svg svg-icon-touchdevelop" viewBox="143 28 100 100" xmlns="http://www.w3.org/2000/svg" role="presentation" aria-label="load/save">
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</div>
</td>
<td>
As well as being able to drag&drop a .Hex file or .py script into the editor to load it,
the <strong>Load/Save</strong> button will open a file window that let's you inspect the files
on the micro:bit. You can drag&drop files into the grey "drop" area or use the file
picker to browse for a file on your computer. You can also download your .hex or .py files from here too.<br><br>
The <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor%2Fraw%2Frefs%2Fheads%2Fmaster%2F%23fs">file system</a> adds functionality to add or remove python modules,
data logs and other file types from the micro:bit.
</td>
</tr>
<tr>
<td>
<div id="command-serial" class="roundsymbol" title="Connect to your micro:bit via serial" style="font-size: 0rem;">
<svg class="svg svg-icon-touchdevelop" viewBox="50 50 380 380" xmlns="http://www.w3.org/2000/svg" role="presentation" aria-label="connect">
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</svg>
</div>
</td>
<td>
The <strong>Open/Close Serial</strong> button allows you to dynamically interact with MicroPython on the micro:bit using the <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor%2Fraw%2Frefs%2Fheads%2Fmaster%2F%23REPL">REPL</a>
</td>
</tr>
<tr id="btn-blocks" class="hidden">
<td>
<div id="command-blockly" class="roundsymbol" title="Go to the blockly editor">
<i class="fa fa-puzzle-piece"></i>
</div>
</td>
<td>
<strong>This is an experimental feature. It may change in the future
and could contain bugs.</strong> Clicking the <strong>Blockly</strong> button
displays a set of drag-and-drop
blocks that can be used to quickly create Python code. Move the
blocks, watch Python code appear and change. <strong>Moving such
blocks will re-write Python code and you may lose work.
Furthermore, the arrangement of blocks is currently not saved,
just the resulting Python code.</strong>
</td>
</tr>
<tr id="btn-snippets" class="hidden">
<td>
<div id="command-snippet" class="roundsymbol" title="Load Python code or .hex file into the editor">
<i class="fa fa-cogs"></i>
</div>
</td>
<td>
Clicking on the <strong>Snippets</strong> button brings up a menu of Python
short-cuts (snippets). Code snippets are short blocks of code to
re-use in your own programs. There are snippets for most common
things you'll want to do with Python. Select the one you want and
fill in the gaps in the code editor to make it do what you want.
<strong class="hide-blocks">Snippets are disabled when blockly is enabled.</strong>
</td>
</tr>
<tr id="btn-options" class="experimental hidden">
<td>
<div id="command-options" class="roundsymbol" title="Change the editor settings">
<i class="fa fa-wrench"></i>
</div>
</td>
<td>
The <strong>Options</strong> menu allows users to change settings within the editor.
Clicking on the menu item will open a dropdown with the various options.
The <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor%2Fraw%2Frefs%2Fheads%2Fmaster%2F%23autocomplete">autocomplete</a> option can be switched on or off here.
When it is on you also have the option to complete code on pressing <kbd>Enter</kbd>
as well as <kbd>Tab</kbd>.
You can also switch the <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor%2Fraw%2Frefs%2Fheads%2Fmaster%2F%23partial-flashing">Quick Flash</a> service on or off.
</td>
</tr>
<tr>
<td>
<div id="command-help" class="roundsymbol" title="Find help and support">
<i class="fa fa-question"></i>
</div>
</td>
<td>
Clicking on the <strong>Help</strong> button opens a range of support options. From here
you can navigate to the MicroPython language reference documentation, this help page :),
the micro:bit support knowledgebase, the feedback form and the Python Editor issue tracker.
</td>
</tr>
<tr>
<td align="center">
<div id="zoom-in" class="roundsymbol-sm" title="Zoom in">
<i class="fa fa-search-plus"></i>
</div>
<div id="zoom-out" class="roundsymbol-sm" title="Zoom out">
<i class="fa fa-search-minus"></i>
</div>
</td>
<td>
Everyone likes to show off their awesome Python skills. These
buttons are especially useful to zoom-in and zoom-out when you're
trying to show code to a large group of people via a
projector.
</td>
</tr>
</table>
<p>The name and description for your script is shown on the top
right hand side. Click them to edit them.</p>
<h3 id="text-editor">Text Editor</h3>
<p>The Text Editor is where we write and edit our scripts.</p>
<p><img src="https://images.weserv.nl/?url=static%2Fimg%2Feditor_text.png&q=12&output=webp&max-age=110"
class="image img-responsive center-block img-rounded"
alt="A picture of the text area in the code editor."/></p>
<p>The text editor tries to help out by colouring the text to show what
all the different parts of program are. For example, Python keywords
(words built into the Python language) are grey. The brighter coloured
words are bits of the program <em>you</em> have created. Brown words
are constant values that never change and purple words represent
strings of characters to display. All the lines are numbered with the
current line highlighted.</p>
<div id="autocomplete" class="experimental hidden">
<h4>Autocomplete</h4>
<p>Autocomplete gives you suggestions for your Python code as you type, giving you more of an understanding of what features are available to you and helping you to create working programs.</p>
<video class="img-responsive center-block" style="max-width: 75%;" autoplay playsinline muted loop>
<source src="static/img/autocomplete-1.mp4" type="video/mp4">
</video>
<p>Press the <kbd>TAB</kbd> key on your keyboard to automatically complete the current line:</p>
<video class="img-responsive center-block" style="max-width: 75%;" autoplay playsinline muted loop>
<source src="static/img/autocomplete-2.mp4" type="video/mp4">
</video>
<p>It's important to note that autocomplete isn't aware of your import statements, so you'll still need to check that your code is correct before flashing it to your device. Remember that typing <code>import microbit</code> means you should then use <code>microbit.display.scroll</code>, whereas <code>from microbit import display</code> allows you to write <code>display.scroll</code>. You can learn more about what this means <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fsupport.microbit.org%2Fsupport%2Fsolutions%2Farticles%2F19000080153-what-is-the-difference-between-import-microbit-and-from-microbit-import-">by reading this support article</a>.</p>
</div>
<h2 id="hello">Hello, World!</h2>
<p>A 'Hello, World!' program is traditionally used as a quick test to see if we've got
our software or hardware configured correctly.</p>
<p><img src="https://images.weserv.nl/?url=static%2Fimg%2Fcomic3.png&q=12&output=webp&max-age=110" class="image img-responsive center-block"
alt="http://goo.gl/zpfrsY"/></p>
<p>Here's how we do this in the Python editor:</p>
<pre><code class="python">from microbit import *
display.scroll("Hello, World!")</code></pre>
<p>The first line (<code>from microbit import *</code>) tells <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor%2Fraw%2Frefs%2Fheads%2Fmaster%2F%23micropython">MicroPython</a>
to get all the bits of Python needed to program the micro:bit.</p>
<p>The second line (<code>display.scroll("Hello, World!")</code>) tells
MicroPython to use one of those bits of Python (the <code>display</code>
module) to scroll the text, <kbd>"Hello, World!"</kbd> across the physical
display on the front of the device.</p>
<video class="img-responsive center-block" style="max-width: 75%;" autoplay playsinline muted loop>
<source src="static/img/scroll-hello.mp4" type="video/mp4">
</video>
<p>When you load the Python editor in your browser, this is the default script you will see,
asking the micro:bit to scroll the words across the LED screen and then display an image of a heart.</p>
<p>Why not try making the micro:bit scroll your name?</p>
<div >
<h2 id="fs">Files and Modules</h2>
<p>When the micro:bit is flashed with MicroPython, it enables a simple file system to store files on the device.
You can use the file system to <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fsupport.microbit.org%2Fsolution%2Farticles%2F19000098018-python-editor-files-and-modules%2F%23emoji">include external python modules in your program</a>,
similarly to using <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fmicrobit-micropython.readthedocs.io%2Fen%2Flatest%2Fpy-modindex.html">MicroPython's built-in-modules</a>.</p>
<p>Selecting the <strong>Load/Save</strong> button in the menu will bring up the files modal window.</p>
<p><img src="https://images.weserv.nl/?url=static%2Fimg%2Ffile-system.png&q=12&output=webp&max-age=110"
class="image img-responsive center-block img-rounded" style="max-width: 75%;"
alt="modal dialogue for the file system interface"/></p>
<p>You can drag and drop files into the Load area or use the <strong>Add file</strong> button to open the file dialogue.</p>
<p>A status bar shows you the file types you have uploaded and how much free space you still have available.
The status bar is colour coded to indicate file types; main.py is purple and the external emoji.py shown in the example is green.
The <strong>main.py</strong> file is your program, the python script from the <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor%2Fraw%2Frefs%2Fheads%2Fmaster%2F%23text-editor">text editor</a>. It is pre-set in the status bar and cannot be removed.
If you try to upload another main.py file this will replace your code in the text editor. The emoji.py is a python module, that we can now reference in main.py.</p>
<p>As you add files, they will appear in a list underneath the status bar. The list indicates
the filename, the file type, the size of the file and the options to download or to trash/delete the file if you have added it by accident.</p>
<p>The file size shown is the space it consumes inside of the micro:bit file system,
not the MICROBIT drive as this is <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fsupport.microbit.org%2Fen%2Fsupport%2Fsolutions%2Farticles%2F19000067847-where-does-the-hex-file-go-when-i-transfer-it-to-the-micro-bit-">emulated storage</a>.</p>
</div>
<div id="blocks" class="hidden">
<h2 id="blockly">Blockly</h2>
<p>Use blockly to make new Python code from easy to assemble blocks of
code.</p>
<p><img src="https://images.weserv.nl/?url=static%2Fimg%2Fblocks.png&q=12&output=webp&max-age=110"
class="image img-responsive center-block img-rounded"
alt="An animation demonstrating how to use snippets."/></p>
<p>Blockly updates Python in the code editor as you move blocks around.
There are lots of different blocks to cover all the features of the
micro:bit. You can make more advanced code by combining blocks together
(such as in the example above).</p>
<p>You should use Blockly to create <em>new code</em> since moving blocks
around will overwrite any existing code you have in the editor (and you may
lose work as a result). The arrangement of blocks isn't (currently)
saved, so Blockly makes a great way to make simple Python code without
lots of typing. In the end, you'll learn that simply typing Python is by
far the quickest and easiest way to write code.</p>
<p>Not all the features of the micro:bit or MicroPython are available via
Blockly. We've done this on purpose. Some of the more advanced and
interesting stuff is only available in pure Python.</p>
<p>However, by using Blockly you'll very quickly get the hang of how Python
code works and fits together.</p>
</div>
<div id=snippets class="hidden">
<h2>Snippets</h2>
<p>Snippets are a cool way to avoid typing. The animation below shows you
how to use them:</p>
<video class="img-responsive center-block" style="max-width: 75%;" autoplay playsinline muted loop>
<source src="static/img/snippet_example.mp4" type="video/mp4">
</video>
<p>You can access snippets from the "Snippets" button (see above), but
it's a lot quicker and easier to learn the <em>triggers</em> for the
different fragments of code, hit the <kbd>TAB</kbd> key to expand the
snippet and then fill in the remaining blocks of code so it does what you
want.</p>
<p>When blockly is enabled the "Snippets" button is disabled. This avoids
snippets from interfering with code that blockly may be generating.</p>
<p><img src="https://images.weserv.nl/?url=static%2Fimg%2Fcomic4.png&q=12&output=webp&max-age=110" class="img-responsive center-block"
alt="http://goo.gl/bT8a8M"/></p>
</div>
<div>
<h2 id="WebUSB">WebUSB</h2>
<p><a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fdevelopers.google.com%2Fweb%2Fupdates%2F2016%2F03%2Faccess-usb-devices-on-the-web">WebUSB</a>
provides a simple way to connect to and control USB devices from the web. At present it is only available in
<a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fcaniuse.com%2F%23feat%3Dwebusb"> browsers that are based on Google Chrome</a>.</p>
<p>In the Python Editor, webUSB means that we can connect to the micro:bit, flash a .Hex file
to it and communicate with it using the <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor%2Fraw%2Frefs%2Fheads%2Fmaster%2F%23REPL">REPL</a>.</p>
<p>If you see the message 'no compatible devices found' when you try to connect,
you may need to <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fmicrobit.org%2Fguide%2Ffirmware">update the micro:bit firmware.</a></p>
<p>For any issues using these features, please read our guide on <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fsupport.microbit.org%2Fa%2Fsolutions%2Farticles%2F19000105428-webusb-troubleshooting%2F">
WebUSB troubleshooting</a>.</p>
<h3>Flash</h3>
<p>To flash the micro:bit from the browser, use the <strong>Connect</strong> button to pair the device
and then choose <strong>Flash</strong>. Your program will then be transferred to the micro:bit.</p>
<video class="img-responsive center-block" style="max-width: 75%;" autoplay playsinline muted loop>
<source src="static/img/flash.mp4" type="video/mp4">
</video>
<h3 id="REPL">REPL</h3>
<p>The Read, Evaluate, Print Loop (REPL) is a way of dynamically interacting with the micro:bit using MicroPython.
To do this, the micro:bit does four things:</p>
<ol>
<li>Read the user input</li>
<li>Evaluate your code</li>
<li>Print the response</li>
<li>Loop back to step 1</li>
</ol>
<p>To interact with the REPL on the micro:bit:</p>
<ul>
<li>Flash a python program to the micro:bit, if you have not done so already.</li>
<li>Select <strong>Open Serial</strong> to open the REPL window.</li>
<li>Where prompted, choose to <strong>Click the blue bar</strong> or <strong>press CTRL-C to enter the REPL</strong>. Once you have done so, try typing something
in MicroPython.</li>
</ul>
<video class="img-responsive center-block" style="max-width: 75%;" autoplay playsinline muted loop>
<source src="static/img/repl.mp4" type="video/mp4">
</video>
<p>Try these things in the REPL:</p>
<pre><code class="python">>>> from microbit import *
>>> display.scroll("Hello from the REPL")
>>> import this
>>> import love
>>> import antigravity</code></pre>
<div class="alert alert-info">
<p>Due to a technical limitation in the software you may
experience data loss if you are sending data over serial at a high rate.</p>
</div>
</div>
<div id="partial-flashing" class="experimental hidden">
<h2>Quick Flash</h2>
<p>The Quick Flash feature allows for super fast updates to be sent to the micro:bit
when edits are made to a program.</p>
<p>To do this, we use a process called 'partial flashing' where only the section of the .Hex file that represents the python script is updated.</p>
<p>With this feature turned on, once you have flashed the initial MicroPython program to the micro:bit, all subsequent flash attempts will be much quicker.</p>
</div>
<h2 id="bugs">Bug Fixes</h2>
<p>Things will go wrong!</p>
<p>You have to imagine Python is the most strict language teacher in the
universe... yes, even more strict than that really strict one you have at
school. Put simply, <strong>you have to type Python without any
mistakes</strong> for it to work.</p>
<p>All programmers make mistakes and create bugs. It's a fact of life.
When you have a bug MicroPython tries to help you out: it will scroll a
message on its display. It may even include a line number.</p>
<p>Common bugs include <em>Syntax Errors</em> (which means you've typed it in
wrong) and <em>Name Errors</em> (that mean you've typed in correct Python, but
it can't work out what you're coding about).</p>
<p>If you're unsure what to do
<a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fmicrobit-micropython.readthedocs.io%2Fen%2Flatest%2F">go read the
MicroPython docs</a> or <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fsupport.microbit.org%2Fen%2Fsupport%2Ftickets%2Fnew">open a support request with the micro:bit team</a>.
<h2 id="more">Further Information</h2>
<p><img src="https://images.weserv.nl/?url=static%2Fimg%2Fcomic5.png&q=12&output=webp&max-age=110" class="img-responsive center-block"
alt="http://goo.gl/q5DAAW"/></p>
<h3 id="micropython">MicroPython</h3>
<p><img src="https://images.weserv.nl/?url=static%2Fimg%2Fcomic6.png&q=12&output=webp&max-age=110" class="img-responsive center-block"
alt="http://goo.gl/9lcLAf"/></p>
<p>The version of Python that runs on the BBC micro:bit is called
MicroPython. It's exactly like <em>real</em> Python except it's designed
to run on small devices like the BBC micro:bit. You can find out more about it
on the <a href="http://akroncuttingedge.com/pFad/index.php?u=http%3A%2F%2Fmicropython.org%2F">MicroPython site</a> and by reading the <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fmicrobit-micropython.readthedocs.io%2Fen%2Flatest%2F">MicroPython for micro:bit reference</a>.</p>
<h3>How the editor works</h3>
<p>To see how the editor actually works? It's easy, to view
the "source code" press CTRL-U (or CMD-U on a Mac). There's a secret
message for you in the code. Can you find it?</p>
<p>The code for the editor lives in a <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor">repository on Github</a>. Github
makes it easy to raise a bug report and contribute to the project. For example, <a href="http://akroncuttingedge.com/pFad/index.php?u=https%3A%2F%2Fgithub.com%2Fbbcmicrobit%2FPythonEditor%2Fblob%2Fmaster%2Fhelp.html">here's the HTML code for this help page</a>.</p>
<h3>What next?</h3>
<p>Python makes it simple to write powerful programs. Can you work out what
this program does?</p>
<pre><code class="python"># Press button A for a fortune cookie.
from microbit import *
import random
fortunes = [
"Never step off a moving bus",
"This sentence is false",
"The meaning of life is overrated",
"Do not touch!",
"You will receive some advice",
"My hovercraft is full of eels",
]
while True:
if button_a.is_pressed():
cookie = random.choice(fortunes)
display.scroll(cookie)</code></pre>
<p>How could you improve it? What changes could you make?</p>
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