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<head>
<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
<title>Codebraid with Python</title>
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</head>
<body>
<header id="title-block-header">
<h1 class="title">Codebraid with Python</h1>
</header>
<h2 id="inline-code">Inline code</h2>
<h3 id="run">Run</h3>
<p>Inline code with <code>.cb-run</code> gives raw stdout.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>`print(1 + 2)`{.python .cb-run}</code></pre>
</div>
<div class="exampleOutput">
<p>3</p>
</div>
</div>
<h3 id="expression-and-inline-notebook">Expression and inline
notebook</h3>
<p>Inline code with <code>.cb-expr</code> evaluates an expression and
then inserts the raw output into the document, where it is interpreted
as Markdown. Inline code with <code>.cb-nb</code> (<code>nb</code> is
short for <code>notebook</code>) is similar, except output is shown
verbatim.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>`"...".join(["*emphasis*", "**strong**", "~~strikeout~~"])`{.python .cb-expr}</code></pre>
</div>
<div class="exampleOutput">
<p><em>emphasis</em>…<strong>strong</strong>…<del>strikeout</del></p>
</div>
</div>
<div class="example">
<div class="exampleMarkup">
<pre><code>`"$2^8 = {}$".format(2**8)`{.python .cb-nb}</code></pre>
</div>
<div class="exampleOutput">
<p><code class="expr">$2^8 = 256$</code></p>
</div>
</div>
<h3 id="stderr">Stderr</h3>
<p>In the event of an error, inline code automatically shows stderr by
default. This code is executed in its own session,
<code>inline_error</code>, so that it does not impact other
examples.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>`1 + "a"`{.python .cb-run session=inline_error}</code></pre>
</div>
<div class="exampleOutput">
<p><code class="stderr error">Traceback (most recent call last): File "<string>", line 1, in <module> 1 + "a" ~~^~~~~ TypeError: unsupported operand type(s) for +: 'int' and 'str'</code></p>
</div>
</div>
<h3 id="source-errors">Source errors</h3>
<p>A message is also displayed for errors in the Markdown source. This
usually includes the name of the document source and the approximate
line number.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>`print(1 + 2)`{.pythn .cb-run session=inline_source_error}</code></pre>
</div>
<div class="exampleOutput">
<p><code class="error sysConfigError">SYS CONFIG ERROR in "python.cbmd" near line 42: Language definition for "pythn" does not exist</code></p>
</div>
</div>
<h3 id="code">Code</h3>
<p>Inline code with <code>.cb-code</code> simply displays the code.
Nothing is executed.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>`print("Hello from Python!")`{.python .cb-code}</code></pre>
</div>
<div class="exampleOutput">
<p><code class="sourceCode python"><span class="bu">print</span>(<span class="st">"Hello from Python!"</span>)</code></p>
</div>
</div>
<p>The output is identical to that of</p>
<pre><code>`print("Hello from Python!")`{.python}</code></pre>
<p>so <code>.cb-code</code> is only really useful when it is combined
with other Codebraid features. For example, it is possible to give code
with <code>.cb-code</code> a <code>name</code>, and then copy it by
<code>name</code> into a separate location where it is executed. See <a href="#copying">Copying code and output</a>.</p>
<h2 id="block-code">Block code</h2>
<h3 id="run-1">Run</h3>
<p>Code blocks with <code>.cb-run</code> give raw stdout. There is
continuity between code blocks so long as they are in the same session;
variables persist.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-run session=hello}
x = 'Hello from *Python!*'
```</code></pre>
</div>
</div>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-run session=hello}
print(x)
```</code></pre>
</div>
<div class="exampleOutput">
<p>Hello from <em>Python!</em></p>
</div>
</div>
<h3 id="notebook">Notebook</h3>
<p>Code blocks with <code>.cb-nb</code> show the code and also the
verbatim stdout.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-nb session=random}
import random
random.seed(2)
rnums = [random.randrange(100) for n in range(10)]
print("Random numbers: {}".format(rnums))
print("Sorted numbers: {}".format(sorted(rnums)))
print("Range: {}".format([min(rnums), max(rnums)]))
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb11" data-startFrom="1"><pre class="sourceCode numberSource python numberLines"><code class="sourceCode python"><span id="cb11-1"><a href="#cb11-1"></a><span class="im">import</span> random</span>
<span id="cb11-2"><a href="#cb11-2"></a>random.seed(<span class="dv">2</span>)</span>
<span id="cb11-3"><a href="#cb11-3"></a>rnums <span class="op">=</span> [random.randrange(<span class="dv">100</span>) <span class="cf">for</span> n <span class="kw">in</span> <span class="bu">range</span>(<span class="dv">10</span>)]</span>
<span id="cb11-4"><a href="#cb11-4"></a><span class="bu">print</span>(<span class="st">"Random numbers: </span><span class="sc">{}</span><span class="st">"</span>.<span class="bu">format</span>(rnums))</span>
<span id="cb11-5"><a href="#cb11-5"></a><span class="bu">print</span>(<span class="st">"Sorted numbers: </span><span class="sc">{}</span><span class="st">"</span>.<span class="bu">format</span>(<span class="bu">sorted</span>(rnums)))</span>
<span id="cb11-6"><a href="#cb11-6"></a><span class="bu">print</span>(<span class="st">"Range: </span><span class="sc">{}</span><span class="st">"</span>.<span class="bu">format</span>([<span class="bu">min</span>(rnums), <span class="bu">max</span>(rnums)]))</span></code></pre></div>
<pre class="stdout"><code>Random numbers: [7, 11, 10, 46, 21, 94, 85, 39, 32, 77]
Sorted numbers: [7, 10, 11, 21, 32, 39, 46, 77, 85, 94]
Range: [7, 94]</code></pre>
</div>
</div>
<p>While there is not yet support for automatically including plots when
using the built-in code execution system, including them manually is
straightforward. (Plots <em>are</em> included automatically when using
the <code>jupyter_kernel</code> option. See the documentation and
Jupyter example document.)</p>
<p>Note that this example uses the <code>show</code> keyword argument
for the code block so that the output is interpreted as raw Markdown
rather than displayed verbatim (the default for
<code>.cb-nb</code>).</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-nb session=plot show=code+stdout:raw+stderr}
import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0, 6, 600)
plt.figure(figsize=(4,2.5))
plt.grid(linestyle='dashed')
plt.plot(x, np.sin(x))
plt.xlabel('$x$')
plt.ylabel('$y=\\sin(x)$')
plt.savefig('plot.png', transparent=True, bbox_inches='tight')
markdown = '''
{width=100% max-width=400px}
'''
print(markdown)
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb14" data-startFrom="1"><pre class="sourceCode numberSource python numberLines"><code class="sourceCode python"><span id="cb14-1"><a href="#cb14-1"></a><span class="im">import</span> numpy <span class="im">as</span> np</span>
<span id="cb14-2"><a href="#cb14-2"></a><span class="im">import</span> matplotlib.pyplot <span class="im">as</span> plt</span>
<span id="cb14-3"><a href="#cb14-3"></a>x <span class="op">=</span> np.linspace(<span class="dv">0</span>, <span class="dv">6</span>, <span class="dv">600</span>)</span>
<span id="cb14-4"><a href="#cb14-4"></a>plt.figure(figsize<span class="op">=</span>(<span class="dv">4</span>,<span class="fl">2.5</span>))</span>
<span id="cb14-5"><a href="#cb14-5"></a>plt.grid(linestyle<span class="op">=</span><span class="st">'dashed'</span>)</span>
<span id="cb14-6"><a href="#cb14-6"></a>plt.plot(x, np.sin(x))</span>
<span id="cb14-7"><a href="#cb14-7"></a>plt.xlabel(<span class="st">'$x$'</span>)</span>
<span id="cb14-8"><a href="#cb14-8"></a>plt.ylabel(<span class="st">'$y=</span><span class="ch">\\</span><span class="st">sin(x)$'</span>)</span>
<span id="cb14-9"><a href="#cb14-9"></a>plt.savefig(<span class="st">'plot.png'</span>, transparent<span class="op">=</span><span class="va">True</span>, bbox_inches<span class="op">=</span><span class="st">'tight'</span>)</span>
<span id="cb14-10"><a href="#cb14-10"></a>markdown <span class="op">=</span> <span class="st">'''</span></span>
<span id="cb14-11"><a href="#cb14-11"></a><span class="st">{width=100% max-width=400px}</span></span>
<span id="cb14-12"><a href="#cb14-12"></a><span class="st">'''</span></span>
<span id="cb14-13"><a href="#cb14-13"></a><span class="bu">print</span>(markdown)</span></code></pre></div>
<figure>
<img 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" style="width:100.0%" data-max-width="400px" alt="The function y=\sin(x)" />
<figcaption aria-hidden="true">The function <span class="math inline"><em>y</em> = sin (<em>x</em>)</span></figcaption>
</figure>
</div>
</div>
<h3 id="stderr-1">Stderr</h3>
<p>Code blocks show stderr automatically by default.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-nb session=block_error}
var = 123
print(var, flush=True)
var += "a"
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb16" data-startFrom="1"><pre class="sourceCode numberSource python numberLines"><code class="sourceCode python"><span id="cb16-1"><a href="#cb16-1"></a>var <span class="op">=</span> <span class="dv">123</span></span>
<span id="cb16-2"><a href="#cb16-2"></a><span class="bu">print</span>(var, flush<span class="op">=</span><span class="va">True</span>)</span>
<span id="cb16-3"><a href="#cb16-3"></a>var <span class="op">+=</span> <span class="st">"a"</span></span></code></pre></div>
<pre class="stdout"><code>123</code></pre>
<pre class="stderr error"><code>Traceback (most recent call last):
File "source.py", line 3, in <module>
var += "a"
TypeError: unsupported operand type(s) for +=: 'int' and 'str'</code></pre>
</div>
</div>
<h3 id="source-errors-1">Source errors</h3>
<p>A message is also displayed for errors in the Markdown source. This
usually includes the name of the document source and the approximate
line number.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-ruuun session=block_source_error}
print(1 + 2)
```</code></pre>
</div>
<div class="exampleOutput">
<pre class="error sourceError"><code>SOURCE ERROR in "python.cbmd" near line 135:
Unknown or unsupported Codebraid command "cb-ruuun"
SOURCE ERROR in "python.cbmd" near line 135:
Missing valid Codebraid command</code></pre>
</div>
</div>
<h3 id="code-1">Code</h3>
<p>Code blocks with <code>.cb-code</code> simply display the code.
Nothing is executed.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-code}
print("Hello from Python!")
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb22" data-startFrom="1"><pre class="sourceCode numberSource python numberLines"><code class="sourceCode python"><span id="cb22-1"><a href="#cb22-1"></a><span class="bu">print</span>(<span class="st">"Hello from Python!"</span>)</span></code></pre></div>
</div>
</div>
<p>The output is essentially identical to that of a normal code block;
the only differences are some default display options, like line
numbering. Thus <code>.cb-code</code> is primarily useful when it is
combined with other Codebraid features. For example, it is possible to
give code with <code>.cb-code</code> a <code>name</code>, and then copy
it by <code>name</code> into a separate location where it is executed.
See <a href="#copying">Copying code and output</a>.</p>
<h2 id="other-options">Other options</h2>
<p>By default, stdout and stderr are only shown if they are non-empty.
In some situations, it may be useful to represent empty output visually
as confirmation that there indeed was none.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-run show=code+stdout+stderr:verbatim_or_empty}
x = 1 + 2
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb24" data-startFrom="1"><pre class="sourceCode numberSource python numberLines"><code class="sourceCode python"><span id="cb24-1"><a href="#cb24-1"></a>x <span class="op">=</span> <span class="dv">1</span> <span class="op">+</span> <span class="dv">2</span></span></code></pre></div>
<pre class="stderr"><code> </code></pre>
</div>
</div>
<p>It is also possible to selectively hide output from a code chunk.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-nb hide=stdout}
print(x)
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb27" data-startFrom="2"><pre class="sourceCode numberSource python numberLines"><code class="sourceCode python" style="counter-reset: source-line 1;"><span id="cb27-2"><a href="#cb27-2"></a><span class="bu">print</span>(x)</span></code></pre></div>
</div>
</div>
<p><code>hide</code> takes any combination of <code>code</code>,
<code>stderr</code>, and <code>stdout</code>, or simply
<code>all</code>.</p>
<h2 id="advanced">Advanced features</h2>
<h3 id="copying">Copying code and output</h3>
<p>Code chunks can be named using the <code>name</code> keyword, which
takes an identifier-style name. Then the <code>copy</code> keyword can
be used in other code chunks to copy a named chunk or a combination of
named chunks. When <code>copy</code> is used with <code>cb-run</code>,
<code>cb-expr</code>, or <code>cb-nb</code>, the code is copied and then
executed as if it had been entered directly. When <code>copy</code> is
used with <code>cb-code</code>, the code is copied and displayed, but
nothing is executed. When <code>copy</code> is used with the special
command <code>cb-paste</code>, both the code and output are copied but
nothing is executed. This is useful in executing code and then showing
snippets of the code and/or output in different parts of a document.</p>
<p><code>copy</code> works with named code chunks anywhere in a
document; a named code chunk does not have to appear in a document
before the location where it is copied. A code chunk that copies another
code chunk can itself have a <code>name</code>, and then itself be
copied.</p>
<p>The next two code chunks are named.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-run name=part1 session=copy_source}
import random
random.seed(2)
rnums = [random.randrange(100) for n in range(10)]
```</code></pre>
</div>
</div>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-run name=part2 session=copy_source}
print("Random numbers: {}".format(rnums))
```</code></pre>
</div>
<div class="exampleOutput">
<p>Random numbers: [7, 11, 10, 46, 21, 94, 85, 39, 32, 77]</p>
</div>
</div>
<p>Now the code and output of the previous two code chunks are copied
and combined. Because the content for this code block is copied from
other code chunks, the code block itself should be empty, or may
alternately contain a space or underscore as a placeholder.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-paste copy=part1+part2 show=code+stdout}
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb31" data-startFrom="1"><pre class="sourceCode numberSource python numberLines"><code class="sourceCode python"><span id="cb31-1"><a href="#cb31-1"></a><span class="im">import</span> random</span>
<span id="cb31-2"><a href="#cb31-2"></a>random.seed(<span class="dv">2</span>)</span>
<span id="cb31-3"><a href="#cb31-3"></a>rnums <span class="op">=</span> [random.randrange(<span class="dv">100</span>) <span class="cf">for</span> n <span class="kw">in</span> <span class="bu">range</span>(<span class="dv">10</span>)]</span>
<span id="cb31-4"><a href="#cb31-4"></a><span class="bu">print</span>(<span class="st">"Random numbers: </span><span class="sc">{}</span><span class="st">"</span>.<span class="bu">format</span>(rnums))</span></code></pre></div>
<pre class="stdout"><code>Random numbers: [7, 11, 10, 46, 21, 94, 85, 39, 32, 77]</code></pre>
</div>
</div>
<p>It would also be possible to copy and re-execute the code.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-run copy=part1+part2 session=copied show=code+stdout:raw}
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb34" data-startFrom="1"><pre class="sourceCode numberSource python numberLines"><code class="sourceCode python"><span id="cb34-1"><a href="#cb34-1"></a><span class="im">import</span> random</span>
<span id="cb34-2"><a href="#cb34-2"></a>random.seed(<span class="dv">2</span>)</span>
<span id="cb34-3"><a href="#cb34-3"></a>rnums <span class="op">=</span> [random.randrange(<span class="dv">100</span>) <span class="cf">for</span> n <span class="kw">in</span> <span class="bu">range</span>(<span class="dv">10</span>)]</span>
<span id="cb34-4"><a href="#cb34-4"></a><span class="bu">print</span>(<span class="st">"Random numbers: </span><span class="sc">{}</span><span class="st">"</span>.<span class="bu">format</span>(rnums))</span></code></pre></div>
<p>Random numbers: [7, 11, 10, 46, 21, 94, 85, 39, 32, 77]</p>
</div>
</div>
<p>Another option is to display code, and then copy and execute it
later.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-code name=hello}
print("Hello from Python!")
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb36" data-startFrom="1"><pre class="sourceCode numberSource python numberLines"><code class="sourceCode python"><span id="cb36-1"><a href="#cb36-1"></a><span class="bu">print</span>(<span class="st">"Hello from Python!"</span>)</span></code></pre></div>
</div>
</div>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.python .cb-nb copy=hello}
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb38" data-startFrom="3"><pre class="sourceCode numberSource python numberLines"><code class="sourceCode python" style="counter-reset: source-line 2;"><span id="cb38-3"><a href="#cb38-3"></a><span class="bu">print</span>(<span class="st">"Hello from Python!"</span>)</span></code></pre></div>
<pre class="stdout"><code>Hello from Python!</code></pre>
</div>
</div>
<h3 id="including-external-files">Including external files</h3>
<p>External files can be included for display or execution using
<code>include_file</code>. The default encoding is UTF-8; other
encodings can be selected with <code>include_encoding</code>. Instead of
including the entire file, it is possible to include only a selected
range of lines with <code>include_lines</code>. It is also possible to
include part of a file that matches a regular expression with
<code>include_regex</code>, as shown in the example. Other options for
controlling what is included based on starting or ending literal strings
or regular expressions can be found in the documentation.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.html .cb-code include_file=python.html include_regex="<header.*?/header>"}
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb41" data-startFrom="1"><pre class="sourceCode numberSource html numberLines"><code class="sourceCode html"><span id="cb41-1"><a href="#cb41-1"></a><span class="dt"><</span><span class="kw">header</span><span class="ot"> id</span><span class="op">=</span><span class="st">"title-block-header"</span><span class="dt">></span></span>
<span id="cb41-2"><a href="#cb41-2"></a><span class="dt"><</span><span class="kw">h1</span><span class="ot"> class</span><span class="op">=</span><span class="st">"title"</span><span class="dt">></span>Codebraid with Python<span class="dt"></</span><span class="kw">h1</span><span class="dt">></span></span>
<span id="cb41-3"><a href="#cb41-3"></a><span class="dt"></</span><span class="kw">header</span><span class="dt">></span></span></code></pre></div>
</div>
</div>
<p>When <code>include_file</code> is used with <code>cb-code</code>, the
included code is simply displayed. When <code>include_file</code> is
used with <code>cb-run</code> or another command that executes code, the
included code is executed just as if it had been entered directly.</p>
</body>
</html>