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Threading and multiprocessing functions
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<div class="sourceCode cell-code" id="cb1"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="im">from</span> fastcore.test <span class="im">import</span> <span class="op">*</span></span>
<span id="cb1-2"><a href="#cb1-2" aria-hidden="true" tabindex="-1"></a><span class="im">from</span> nbdev.showdoc <span class="im">import</span> <span class="op">*</span></span>
<span id="cb1-3"><a href="#cb1-3" aria-hidden="true" tabindex="-1"></a><span class="im">from</span> fastcore.nb_imports <span class="im">import</span> <span class="op">*</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
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<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/parallel.py#L23" target="_blank" style="float:right; font-size:smaller">source</a></p>
<section id="threaded" class="level3">
<h3 class="anchored" data-anchor-id="threaded">threaded</h3>
<blockquote class="blockquote">
<pre><code> threaded (process=False)</code></pre>
</blockquote>
<p><em>Run <code>f</code> in a <code>Thread</code> (or <code>Process</code> if <code>process=True</code>), and returns it</em></p>
<div id="cell-4" class="cell">
<div class="sourceCode cell-code" id="cb3"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="at">@threaded</span></span>
<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a><span class="kw">def</span> _1():</span>
<span id="cb3-3"><a href="#cb3-3" aria-hidden="true" tabindex="-1"></a> time.sleep(<span class="fl">0.05</span>)</span>
<span id="cb3-4"><a href="#cb3-4" aria-hidden="true" tabindex="-1"></a> <span class="bu">print</span>(<span class="st">"second"</span>)</span>
<span id="cb3-5"><a href="#cb3-5" aria-hidden="true" tabindex="-1"></a> <span class="cf">return</span> <span class="dv">5</span></span>
<span id="cb3-6"><a href="#cb3-6" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb3-7"><a href="#cb3-7" aria-hidden="true" tabindex="-1"></a><span class="at">@threaded</span></span>
<span id="cb3-8"><a href="#cb3-8" aria-hidden="true" tabindex="-1"></a><span class="kw">def</span> _2():</span>
<span id="cb3-9"><a href="#cb3-9" aria-hidden="true" tabindex="-1"></a> time.sleep(<span class="fl">0.01</span>)</span>
<span id="cb3-10"><a href="#cb3-10" aria-hidden="true" tabindex="-1"></a> <span class="bu">print</span>(<span class="st">"first"</span>)</span>
<span id="cb3-11"><a href="#cb3-11" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb3-12"><a href="#cb3-12" aria-hidden="true" tabindex="-1"></a>a <span class="op">=</span> _1()</span>
<span id="cb3-13"><a href="#cb3-13" aria-hidden="true" tabindex="-1"></a>_2()</span>
<span id="cb3-14"><a href="#cb3-14" aria-hidden="true" tabindex="-1"></a>time.sleep(<span class="fl">0.1</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>first
second</code></pre>
</div>
</div>
<p>After the thread is complete, the return value is stored in the <code>result</code> attr.</p>
<div id="cell-6" class="cell">
<div class="sourceCode cell-code" id="cb5"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a>a.result</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-display">
<pre><code>5</code></pre>
</div>
</div>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/parallel.py#L43" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="startthread" class="level3">
<h3 class="anchored" data-anchor-id="startthread">startthread</h3>
<blockquote class="blockquote">
<pre><code> startthread (f)</code></pre>
</blockquote>
<p><em>Like <a href="https://fastcore.fast.ai/parallel.html#threaded"><code>threaded</code></a>, but start thread immediately</em></p>
<div id="cell-8" class="cell">
<div class="sourceCode cell-code" id="cb8"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="at">@startthread</span></span>
<span id="cb8-2"><a href="#cb8-2" aria-hidden="true" tabindex="-1"></a><span class="kw">def</span> _():</span>
<span id="cb8-3"><a href="#cb8-3" aria-hidden="true" tabindex="-1"></a> time.sleep(<span class="fl">0.05</span>)</span>
<span id="cb8-4"><a href="#cb8-4" aria-hidden="true" tabindex="-1"></a> <span class="bu">print</span>(<span class="st">"second"</span>)</span>
<span id="cb8-5"><a href="#cb8-5" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb8-6"><a href="#cb8-6" aria-hidden="true" tabindex="-1"></a><span class="at">@startthread</span></span>
<span id="cb8-7"><a href="#cb8-7" aria-hidden="true" tabindex="-1"></a><span class="kw">def</span> _():</span>
<span id="cb8-8"><a href="#cb8-8" aria-hidden="true" tabindex="-1"></a> time.sleep(<span class="fl">0.01</span>)</span>
<span id="cb8-9"><a href="#cb8-9" aria-hidden="true" tabindex="-1"></a> <span class="bu">print</span>(<span class="st">"first"</span>)</span>
<span id="cb8-10"><a href="#cb8-10" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb8-11"><a href="#cb8-11" aria-hidden="true" tabindex="-1"></a>time.sleep(<span class="fl">0.1</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>first
second</code></pre>
</div>
</div>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/parallel.py#L48" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="startproc" class="level3">
<h3 class="anchored" data-anchor-id="startproc">startproc</h3>
<blockquote class="blockquote">
<pre><code> startproc (f)</code></pre>
</blockquote>
<p><em>Like <code>threaded(True)</code>, but start Process immediately</em></p>
<div id="cell-10" class="cell">
<div class="sourceCode cell-code" id="cb11"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb11-1"><a href="#cb11-1" aria-hidden="true" tabindex="-1"></a><span class="at">@startproc</span></span>
<span id="cb11-2"><a href="#cb11-2" aria-hidden="true" tabindex="-1"></a><span class="kw">def</span> _():</span>
<span id="cb11-3"><a href="#cb11-3" aria-hidden="true" tabindex="-1"></a> time.sleep(<span class="fl">0.05</span>)</span>
<span id="cb11-4"><a href="#cb11-4" aria-hidden="true" tabindex="-1"></a> <span class="bu">print</span>(<span class="st">"second"</span>)</span>
<span id="cb11-5"><a href="#cb11-5" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb11-6"><a href="#cb11-6" aria-hidden="true" tabindex="-1"></a><span class="at">@startproc</span></span>
<span id="cb11-7"><a href="#cb11-7" aria-hidden="true" tabindex="-1"></a><span class="kw">def</span> _():</span>
<span id="cb11-8"><a href="#cb11-8" aria-hidden="true" tabindex="-1"></a> time.sleep(<span class="fl">0.01</span>)</span>
<span id="cb11-9"><a href="#cb11-9" aria-hidden="true" tabindex="-1"></a> <span class="bu">print</span>(<span class="st">"first"</span>)</span>
<span id="cb11-10"><a href="#cb11-10" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb11-11"><a href="#cb11-11" aria-hidden="true" tabindex="-1"></a>time.sleep(<span class="fl">0.1</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>first
second</code></pre>
</div>
</div>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/parallel.py#L64" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="parallelable" class="level3">
<h3 class="anchored" data-anchor-id="parallelable">parallelable</h3>
<blockquote class="blockquote">
<pre><code> parallelable (param_name, num_workers, f=None)</code></pre>
</blockquote>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/parallel.py#L73" target="_blank" style="float:right; font-size:smaller">source</a></p>
<section id="threadpoolexecutor" class="level4">
<h4 class="anchored" data-anchor-id="threadpoolexecutor">ThreadPoolExecutor</h4>
<blockquote class="blockquote">
<pre><code> ThreadPoolExecutor (max_workers=4, on_exc=<built-in function print>,
pause=0, **kwargs)</code></pre>
</blockquote>
<p><em>Same as Python’s ThreadPoolExecutor, except can pass <code>max_workers==0</code> for serial execution</em></p>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/parallel.py#L92" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="processpoolexecutor" class="level4">
<h4 class="anchored" data-anchor-id="processpoolexecutor">ProcessPoolExecutor</h4>
<blockquote class="blockquote">
<pre><code> ProcessPoolExecutor (max_workers=4, on_exc=<built-in function print>,
pause=0, mp_context=None, initializer=None,
initargs=())</code></pre>
</blockquote>
<p><em>Same as Python’s ProcessPoolExecutor, except can pass <code>max_workers==0</code> for serial execution</em></p>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/parallel.py#L118" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
</section>
<section id="parallel" class="level3">
<h3 class="anchored" data-anchor-id="parallel">parallel</h3>
<blockquote class="blockquote">
<pre><code> parallel (f, items, *args, n_workers=4, total=None, progress=None,
pause=0, method=None, threadpool=False, timeout=None,
chunksize=1, **kwargs)</code></pre>
</blockquote>
<p><em>Applies <code>func</code> in parallel to <code>items</code>, using <code>n_workers</code></em></p>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/parallel.py#L135" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="add_one" class="level3">
<h3 class="anchored" data-anchor-id="add_one">add_one</h3>
<blockquote class="blockquote">
<pre><code> add_one (x, a=1)</code></pre>
</blockquote>
<div id="cell-16" class="cell">
<div class="sourceCode cell-code" id="cb18"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb18-1"><a href="#cb18-1" aria-hidden="true" tabindex="-1"></a>inp,exp <span class="op">=</span> <span class="bu">range</span>(<span class="dv">50</span>),<span class="bu">range</span>(<span class="dv">1</span>,<span class="dv">51</span>)</span>
<span id="cb18-2"><a href="#cb18-2" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb18-3"><a href="#cb18-3" aria-hidden="true" tabindex="-1"></a>test_eq(parallel(add_one, inp, n_workers<span class="op">=</span><span class="dv">2</span>, progress<span class="op">=</span><span class="va">False</span>), exp)</span>
<span id="cb18-4"><a href="#cb18-4" aria-hidden="true" tabindex="-1"></a>test_eq(parallel(add_one, inp, threadpool<span class="op">=</span><span class="va">True</span>, n_workers<span class="op">=</span><span class="dv">2</span>, progress<span class="op">=</span><span class="va">False</span>), exp)</span>
<span id="cb18-5"><a href="#cb18-5" aria-hidden="true" tabindex="-1"></a>test_eq(parallel(add_one, inp, n_workers<span class="op">=</span><span class="dv">1</span>, a<span class="op">=</span><span class="dv">2</span>), <span class="bu">range</span>(<span class="dv">2</span>,<span class="dv">52</span>))</span>
<span id="cb18-6"><a href="#cb18-6" aria-hidden="true" tabindex="-1"></a>test_eq(parallel(add_one, inp, n_workers<span class="op">=</span><span class="dv">0</span>), exp)</span>
<span id="cb18-7"><a href="#cb18-7" aria-hidden="true" tabindex="-1"></a>test_eq(parallel(add_one, inp, n_workers<span class="op">=</span><span class="dv">0</span>, a<span class="op">=</span><span class="dv">2</span>), <span class="bu">range</span>(<span class="dv">2</span>,<span class="dv">52</span>))</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<p>Use the <code>pause</code> parameter to ensure a pause of <code>pause</code> seconds between processes starting. This is in case there are race conditions in starting some process, or to stagger the time each process starts, for example when making many requests to a webserver. Set <code>threadpool=True</code> to use <a href="https://fastcore.fast.ai/parallel.html#threadpoolexecutor"><code>ThreadPoolExecutor</code></a> instead of <a href="https://fastcore.fast.ai/parallel.html#processpoolexecutor"><code>ProcessPoolExecutor</code></a>.</p>
<div id="cell-18" class="cell">
<div class="sourceCode cell-code" id="cb19"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb19-1"><a href="#cb19-1" aria-hidden="true" tabindex="-1"></a><span class="im">from</span> datetime <span class="im">import</span> datetime</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<div id="cell-19" class="cell">
<div class="sourceCode cell-code" id="cb20"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb20-1"><a href="#cb20-1" aria-hidden="true" tabindex="-1"></a><span class="kw">def</span> print_time(i): </span>
<span id="cb20-2"><a href="#cb20-2" aria-hidden="true" tabindex="-1"></a> time.sleep(random.random()<span class="op">/</span><span class="dv">1000</span>)</span>
<span id="cb20-3"><a href="#cb20-3" aria-hidden="true" tabindex="-1"></a> <span class="bu">print</span>(i, datetime.now())</span>
<span id="cb20-4"><a href="#cb20-4" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb20-5"><a href="#cb20-5" aria-hidden="true" tabindex="-1"></a>parallel(print_time, <span class="bu">range</span>(<span class="dv">5</span>), n_workers<span class="op">=</span><span class="dv">2</span>, pause<span class="op">=</span><span class="fl">0.25</span>)<span class="op">;</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>0 2022-08-07 05:10:05.999916
1 2022-08-07 05:10:06.252031
2 2022-08-07 05:10:06.503603
3 2022-08-07 05:10:06.755216
4 2022-08-07 05:10:07.006702</code></pre>
</div>
</div>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/parallel.py#L142" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="run_procs" class="level3">
<h3 class="anchored" data-anchor-id="run_procs">run_procs</h3>
<blockquote class="blockquote">
<pre><code> run_procs (f, f_done, args)</code></pre>
</blockquote>
<p><em>Call <code>f</code> for each item in <code>args</code> in parallel, yielding <code>f_done</code></em></p>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/parallel.py#L156" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="parallel_gen" class="level3">
<h3 class="anchored" data-anchor-id="parallel_gen">parallel_gen</h3>
<blockquote class="blockquote">
<pre><code> parallel_gen (cls, items, n_workers=4, **kwargs)</code></pre>
</blockquote>
<p><em>Instantiate <code>cls</code> in <code>n_workers</code> procs & call each on a subset of <code>items</code> in parallel.</em></p>
<div id="cell-22" class="cell">
<div class="sourceCode cell-code" id="cb24"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb24-1"><a href="#cb24-1" aria-hidden="true" tabindex="-1"></a><span class="co"># class _C:</span></span>
<span id="cb24-2"><a href="#cb24-2" aria-hidden="true" tabindex="-1"></a><span class="co"># def __call__(self, o): return ((i+1) for i in o)</span></span>
<span id="cb24-3"><a href="#cb24-3" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb24-4"><a href="#cb24-4" aria-hidden="true" tabindex="-1"></a><span class="co"># items = range(5)</span></span>
<span id="cb24-5"><a href="#cb24-5" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb24-6"><a href="#cb24-6" aria-hidden="true" tabindex="-1"></a><span class="co"># res = L(parallel_gen(_C, items, n_workers=0))</span></span>
<span id="cb24-7"><a href="#cb24-7" aria-hidden="true" tabindex="-1"></a><span class="co"># idxs,dat1 = zip(*res.sorted(itemgetter(0)))</span></span>
<span id="cb24-8"><a href="#cb24-8" aria-hidden="true" tabindex="-1"></a><span class="co"># test_eq(dat1, range(1,6))</span></span>
<span id="cb24-9"><a href="#cb24-9" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb24-10"><a href="#cb24-10" aria-hidden="true" tabindex="-1"></a><span class="co"># res = L(parallel_gen(_C, items, n_workers=3))</span></span>
<span id="cb24-11"><a href="#cb24-11" aria-hidden="true" tabindex="-1"></a><span class="co"># idxs,dat2 = zip(*res.sorted(itemgetter(0)))</span></span>
<span id="cb24-12"><a href="#cb24-12" aria-hidden="true" tabindex="-1"></a><span class="co"># test_eq(dat2, dat1)</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<p><code>cls</code> is any class with <code>__call__</code>. It will be passed <code>args</code> and <code>kwargs</code> when initialized. Note that <code>n_workers</code> instances of <code>cls</code> are created, one in each process. <code>items</code> are then split in <code>n_workers</code> batches and one is sent to each <code>cls</code>. The function then returns a generator of tuples of item indices and results.</p>
<div id="cell-24" class="cell">
<div class="sourceCode cell-code" id="cb25"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb25-1"><a href="#cb25-1" aria-hidden="true" tabindex="-1"></a><span class="kw">class</span> TestSleepyBatchFunc:</span>
<span id="cb25-2"><a href="#cb25-2" aria-hidden="true" tabindex="-1"></a> <span class="co">"For testing parallel processes that run at different speeds"</span></span>
<span id="cb25-3"><a href="#cb25-3" aria-hidden="true" tabindex="-1"></a> <span class="kw">def</span> <span class="fu">__init__</span>(<span class="va">self</span>): <span class="va">self</span>.a<span class="op">=</span><span class="dv">1</span></span>
<span id="cb25-4"><a href="#cb25-4" aria-hidden="true" tabindex="-1"></a> <span class="kw">def</span> <span class="fu">__call__</span>(<span class="va">self</span>, batch):</span>
<span id="cb25-5"><a href="#cb25-5" aria-hidden="true" tabindex="-1"></a> <span class="cf">for</span> k <span class="kw">in</span> batch:</span>
<span id="cb25-6"><a href="#cb25-6" aria-hidden="true" tabindex="-1"></a> time.sleep(random.random()<span class="op">/</span><span class="dv">4</span>)</span>
<span id="cb25-7"><a href="#cb25-7" aria-hidden="true" tabindex="-1"></a> <span class="cf">yield</span> k<span class="op">+</span><span class="va">self</span>.a</span>
<span id="cb25-8"><a href="#cb25-8" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb25-9"><a href="#cb25-9" aria-hidden="true" tabindex="-1"></a>x <span class="op">=</span> np.linspace(<span class="dv">0</span>,<span class="fl">0.99</span>,<span class="dv">20</span>)</span>
<span id="cb25-10"><a href="#cb25-10" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb25-11"><a href="#cb25-11" aria-hidden="true" tabindex="-1"></a>res <span class="op">=</span> L(parallel_gen(TestSleepyBatchFunc, x, n_workers<span class="op">=</span><span class="dv">2</span>))</span>
<span id="cb25-12"><a href="#cb25-12" aria-hidden="true" tabindex="-1"></a>test_eq(res.<span class="bu">sorted</span>().itemgot(<span class="dv">1</span>), x<span class="op">+</span><span class="dv">1</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-display">
<style>
/* Turns off some styling */
progress {
/* gets rid of default border in Firefox and Opera. */
border: none;
/* Needs to be in here for Safari polyfill so background images work as expected. */
background-size: auto;
}
progress:not([value]), progress:not([value])::-webkit-progress-bar {
background: repeating-linear-gradient(45deg, #7e7e7e, #7e7e7e 10px, #5c5c5c 10px, #5c5c5c 20px);
}
.progress-bar-interrupted, .progress-bar-interrupted::-webkit-progress-bar {
background: #F44336;
}
</style>
</div>
<div class="cell-output cell-output-display">
</div>
</div>
<div id="cell-25" class="cell">
<div class="sourceCode cell-code" id="cb26"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb26-1"><a href="#cb26-1" aria-hidden="true" tabindex="-1"></a><span class="co"># #|hide</span></span>
<span id="cb26-2"><a href="#cb26-2" aria-hidden="true" tabindex="-1"></a><span class="co"># from subprocess import Popen, PIPE</span></span>
<span id="cb26-3"><a href="#cb26-3" aria-hidden="true" tabindex="-1"></a><span class="co"># # test num_workers > 0 in scripts works when python process start method is spawn</span></span>
<span id="cb26-4"><a href="#cb26-4" aria-hidden="true" tabindex="-1"></a><span class="co"># process = Popen(["python", "parallel_test.py"], stdout=PIPE)</span></span>
<span id="cb26-5"><a href="#cb26-5" aria-hidden="true" tabindex="-1"></a><span class="co"># _, err = process.communicate(timeout=10)</span></span>
<span id="cb26-6"><a href="#cb26-6" aria-hidden="true" tabindex="-1"></a><span class="co"># exit_code = process.wait()</span></span>
<span id="cb26-7"><a href="#cb26-7" aria-hidden="true" tabindex="-1"></a><span class="co"># test_eq(exit_code, 0)</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
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</section>
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var currentTitle = button.getAttribute("title");
button.setAttribute("title", "Copied!");
let tooltip;
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button.setAttribute("data-bs-toggle", "tooltip");
button.setAttribute("data-bs-placement", "left");
button.setAttribute("data-bs-title", "Copied!");
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customClass: "code-copy-button-tooltip",
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tooltip.show();
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tooltip.hide();
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button.removeAttribute("data-bs-toggle");
button.removeAttribute("data-bs-placement");
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}, 1000);
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});
var localhostRegex = new RegExp(/^(?:http|https):\/\/localhost\:?[0-9]*\//);
var mailtoRegex = new RegExp(/^mailto:/);
var filterRegex = new RegExp("https:\/\/fastcore\.fast\.ai\/");
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if (link.dataset.originalHref !== undefined) {
link.href = link.dataset.originalHref;
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}
}
function tippyHover(el, contentFn, onTriggerFn, onUntriggerFn) {
const config = {
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maxWidth: 500,
delay: 100,
arrow: false,
appendTo: function(el) {
return el.parentElement;
},
interactive: true,
interactiveBorder: 10,
theme: 'quarto',
placement: 'bottom-start',
};
if (contentFn) {
config.content = contentFn;
}
if (onTriggerFn) {
config.onTrigger = onTriggerFn;
}
if (onUntriggerFn) {
config.onUntrigger = onUntriggerFn;
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window.tippy(el, config);
}
const noterefs = window.document.querySelectorAll('a[role="doc-noteref"]');
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tippyHover(ref, function() {
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let href = ref.getAttribute('data-footnote-href') || ref.getAttribute('href');
try { href = new URL(href).hash; } catch {}
const id = href.replace(/^#\/?/, "");
const note = window.document.getElementById(id);
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window.Quarto.typesetMath(note);
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window.Quarto.typesetMath(note);
}
// TODO in 1.5, we should make sure this works without a callout special case
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return note.outerHTML;
} else {
return note.innerHTML;
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}
for (var i=0; i<xrefs.length; i++) {
const xref = xrefs[i];
tippyHover(xref, undefined, function(instance) {
instance.disable();
let url = xref.getAttribute('href');
let hash = undefined;
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const note = window.document.getElementById(id);
if (note !== null) {
try {
const html = processXRef(id, note.cloneNode(true));
instance.setContent(html);
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instance.enable();
instance.show();
}
} else {
// See if we can fetch this
fetch(url.split('#')[0])
.then(res => res.text())
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const parser = new DOMParser();
const htmlDoc = parser.parseFromString(html, "text/html");
const note = htmlDoc.getElementById(id);
if (note !== null) {
const html = processXRef(id, note);
instance.setContent(html);
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instance.enable();
instance.show();
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// This is a special case and we should probably do some content thinning / targeting
fetch(url)
.then(res => res.text())
.then(html => {
const parser = new DOMParser();
const htmlDoc = parser.parseFromString(html, "text/html");
const note = htmlDoc.querySelector('main.content');
if (note !== null) {
// This should only happen for chapter cross references
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if (note.children.length > 0 && note.children[0].tagName === "HEADER") {
note.children[0].remove();
}
const html = processXRef(null, note);
instance.setContent(html);
}
}).finally(() => {
instance.enable();
instance.show();
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let selectedAnnoteEl;
const selectorForAnnotation = ( cell, annotation) => {
let cellAttr = 'data-code-cell="' + cell + '"';
let lineAttr = 'data-code-annotation="' + annotation + '"';
const selector = 'span[' + cellAttr + '][' + lineAttr + ']';
return selector;
}
const selectCodeLines = (annoteEl) => {
const doc = window.document;
const targetCell = annoteEl.getAttribute("data-target-cell");
const targetAnnotation = annoteEl.getAttribute("data-target-annotation");
const annoteSpan = window.document.querySelector(selectorForAnnotation(targetCell, targetAnnotation));
const lines = annoteSpan.getAttribute("data-code-lines").split(",");
const lineIds = lines.map((line) => {
return targetCell + "-" + line;
})
let top = null;
let height = null;
let parent = null;
if (lineIds.length > 0) {
//compute the position of the single el (top and bottom and make a div)
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top = el.offsetTop;
height = el.offsetHeight;
parent = el.parentElement.parentElement;
if (lineIds.length > 1) {
const lastEl = window.document.getElementById(lineIds[lineIds.length - 1]);
const bottom = lastEl.offsetTop + lastEl.offsetHeight;
height = bottom - top;
}
if (top !== null && height !== null && parent !== null) {
// cook up a div (if necessary) and position it
let div = window.document.getElementById("code-annotation-line-highlight");
if (div === null) {
div = window.document.createElement("div");
div.setAttribute("id", "code-annotation-line-highlight");
div.style.position = 'absolute';
parent.appendChild(div);
}
div.style.top = top - 2 + "px";
div.style.height = height + 4 + "px";
div.style.left = 0;
let gutterDiv = window.document.getElementById("code-annotation-line-highlight-gutter");
if (gutterDiv === null) {
gutterDiv = window.document.createElement("div");
gutterDiv.setAttribute("id", "code-annotation-line-highlight-gutter");
gutterDiv.style.position = 'absolute';
const codeCell = window.document.getElementById(targetCell);
const gutter = codeCell.querySelector('.code-annotation-gutter');
gutter.appendChild(gutterDiv);
}
gutterDiv.style.top = top - 2 + "px";
gutterDiv.style.height = height + 4 + "px";
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selectedAnnoteEl = annoteEl;
}
};
const unselectCodeLines = () => {
const elementsIds = ["code-annotation-line-highlight", "code-annotation-line-highlight-gutter"];
elementsIds.forEach((elId) => {
const div = window.document.getElementById(elId);
if (div) {
div.remove();
}
});
selectedAnnoteEl = undefined;
};
// Handle positioning of the toggle
window.addEventListener(
"resize",
throttle(() => {
elRect = undefined;
if (selectedAnnoteEl) {
selectCodeLines(selectedAnnoteEl);
}
}, 10)
);
function throttle(fn, ms) {
let throttle = false;
let timer;
return (...args) => {
if(!throttle) { // first call gets through
fn.apply(this, args);
throttle = true;
} else { // all the others get throttled
if(timer) clearTimeout(timer); // cancel #2
timer = setTimeout(() => {
fn.apply(this, args);
timer = throttle = false;
}, ms);
}
};
}
// Attach click handler to the DT
const annoteDls = window.document.querySelectorAll('dt[data-target-cell]');
for (const annoteDlNode of annoteDls) {
annoteDlNode.addEventListener('click', (event) => {
const clickedEl = event.target;
if (clickedEl !== selectedAnnoteEl) {
unselectCodeLines();
const activeEl = window.document.querySelector('dt[data-target-cell].code-annotation-active');
if (activeEl) {
activeEl.classList.remove('code-annotation-active');
}
selectCodeLines(clickedEl);
clickedEl.classList.add('code-annotation-active');
} else {
// Unselect the line
unselectCodeLines();
clickedEl.classList.remove('code-annotation-active');
}
});
}
const findCites = (el) => {
const parentEl = el.parentElement;
if (parentEl) {
const cites = parentEl.dataset.cites;
if (cites) {
return {
el,
cites: cites.split(' ')
};
} else {
return findCites(el.parentElement)
}
} else {
return undefined;
}
};
var bibliorefs = window.document.querySelectorAll('a[role="doc-biblioref"]');
for (var i=0; i<bibliorefs.length; i++) {
const ref = bibliorefs[i];
const citeInfo = findCites(ref);
if (citeInfo) {
tippyHover(citeInfo.el, function() {
var popup = window.document.createElement('div');
citeInfo.cites.forEach(function(cite) {
var citeDiv = window.document.createElement('div');
citeDiv.classList.add('hanging-indent');
citeDiv.classList.add('csl-entry');
var biblioDiv = window.document.getElementById('ref-' + cite);
if (biblioDiv) {
citeDiv.innerHTML = biblioDiv.innerHTML;
}
popup.appendChild(citeDiv);
});
return popup.innerHTML;
});
}
}
});
</script>
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