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<section id="module-botcore.utils.scheduling">
<span id="scheduling"></span><h1>scheduling<a class="headerlink" href="#module-botcore.utils.scheduling" title="Permalink to this headline">#</a></h1>
<p>Generic python scheduler.</p>
<dl class="py class">
<dt class="sig sig-object py" id="botcore.utils.scheduling.Scheduler">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">Scheduler</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name</span></span></em><span class="sig-paren">)</span><a class="reference external" href="https://github.com/python-discord/bot-core/blob/bc0a470dcd99007581975f23efabbda9266dac9d/botcore/utils/scheduling.py#L13-L209"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#botcore.utils.scheduling.Scheduler" title="Permalink to this definition">#</a></dt>
<dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p>
<p>Schedule the execution of coroutines and keep track of them.</p>
<p>When instantiating a <a class="reference internal" href="#botcore.utils.scheduling.Scheduler" title="botcore.utils.scheduling.Scheduler"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Scheduler</span></code></a>, a name must be provided. This name is used to distinguish the
instance’s log messages from other instances. Using the name of the class or module containing
the instance is suggested.</p>
<p>Coroutines can be scheduled immediately with <a class="reference internal" href="#botcore.utils.scheduling.Scheduler.schedule" title="botcore.utils.scheduling.Scheduler.schedule"><code class="xref py py-obj docutils literal notranslate"><span class="pre">schedule</span></code></a> or in the future with <a class="reference internal" href="#botcore.utils.scheduling.Scheduler.schedule_at" title="botcore.utils.scheduling.Scheduler.schedule_at"><code class="xref py py-obj docutils literal notranslate"><span class="pre">schedule_at</span></code></a>
or <a class="reference internal" href="#botcore.utils.scheduling.Scheduler.schedule_later" title="botcore.utils.scheduling.Scheduler.schedule_later"><code class="xref py py-obj docutils literal notranslate"><span class="pre">schedule_later</span></code></a>. A unique ID is required to be given in order to keep track of the
resulting Tasks. Any scheduled task can be cancelled prematurely using <a class="reference internal" href="#botcore.utils.scheduling.Scheduler.cancel" title="botcore.utils.scheduling.Scheduler.cancel"><code class="xref py py-obj docutils literal notranslate"><span class="pre">cancel</span></code></a> by providing
the same ID used to schedule it.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">in</span></code> operator is supported for checking if a task with a given ID is currently scheduled.</p>
<p>Any exception raised in a scheduled task is logged when the task is done.</p>
<dl class="py method">
<dt class="sig sig-object py" id="botcore.utils.scheduling.Scheduler.__contains__">
<span class="sig-name descname"><span class="pre">__contains__</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">task_id</span></span></em><span class="sig-paren">)</span><a class="reference external" href="https://github.com/python-discord/bot-core/blob/bc0a470dcd99007581975f23efabbda9266dac9d/botcore/utils/scheduling.py#L43-L54"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#botcore.utils.scheduling.Scheduler.__contains__" title="Permalink to this definition">#</a></dt>
<dd><p>Return <a class="reference external" href="https://docs.python.org/3/library/constants.html#True" title="(in Python v3.10)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">True</span></code></a> if a task with the given <code class="docutils literal notranslate"><span class="pre">task_id</span></code> is currently scheduled.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><p><strong>task_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Hashable" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Hashable</span></code></a>) – The task to look for.</p>
</dd>
<dt class="field-even">Return type</dt>
<dd class="field-even"><p><a class="reference external" href="https://docs.python.org/3/library/functions.html#bool" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">bool</span></code></a></p>
</dd>
<dt class="field-odd">Returns</dt>
<dd class="field-odd"><p><a class="reference external" href="https://docs.python.org/3/library/constants.html#True" title="(in Python v3.10)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">True</span></code></a> if the task was found.</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="botcore.utils.scheduling.Scheduler.__init__">
<span class="sig-name descname"><span class="pre">__init__</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name</span></span></em><span class="sig-paren">)</span><a class="reference external" href="https://github.com/python-discord/bot-core/blob/bc0a470dcd99007581975f23efabbda9266dac9d/botcore/utils/scheduling.py#L31-L42"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#botcore.utils.scheduling.Scheduler.__init__" title="Permalink to this definition">#</a></dt>
<dd><p>Initialize a new <a class="reference internal" href="#botcore.utils.scheduling.Scheduler" title="botcore.utils.scheduling.Scheduler"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Scheduler</span></code></a> instance.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><p><strong>name</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">str</span></code></a>) – The name of the <a class="reference internal" href="#botcore.utils.scheduling.Scheduler" title="botcore.utils.scheduling.Scheduler"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Scheduler</span></code></a>. Used in logging, and namespacing.</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="botcore.utils.scheduling.Scheduler.cancel">
<span class="sig-name descname"><span class="pre">cancel</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">task_id</span></span></em><span class="sig-paren">)</span><a class="reference external" href="https://github.com/python-discord/bot-core/blob/bc0a470dcd99007581975f23efabbda9266dac9d/botcore/utils/scheduling.py#L125-L142"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#botcore.utils.scheduling.Scheduler.cancel" title="Permalink to this definition">#</a></dt>
<dd><p>Unschedule the task identified by <code class="docutils literal notranslate"><span class="pre">task_id</span></code>. Log a warning if the task doesn’t exist.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><p><strong>task_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Hashable" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Hashable</span></code></a>) – The task’s unique ID.</p>
</dd>
<dt class="field-even">Return type</dt>
<dd class="field-even"><p><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.10)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">None</span></code></a></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="botcore.utils.scheduling.Scheduler.cancel_all">
<span class="sig-name descname"><span class="pre">cancel_all</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference external" href="https://github.com/python-discord/bot-core/blob/bc0a470dcd99007581975f23efabbda9266dac9d/botcore/utils/scheduling.py#L143-L149"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#botcore.utils.scheduling.Scheduler.cancel_all" title="Permalink to this definition">#</a></dt>
<dd><p>Unschedule all known tasks.</p>
<dl class="field-list simple">
<dt class="field-odd">Return type</dt>
<dd class="field-odd"><p><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.10)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">None</span></code></a></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="botcore.utils.scheduling.Scheduler.schedule">
<span class="sig-name descname"><span class="pre">schedule</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">task_id</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">coroutine</span></span></em><span class="sig-paren">)</span><a class="reference external" href="https://github.com/python-discord/bot-core/blob/bc0a470dcd99007581975f23efabbda9266dac9d/botcore/utils/scheduling.py#L55-L81"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#botcore.utils.scheduling.Scheduler.schedule" title="Permalink to this definition">#</a></dt>
<dd><p>Schedule the execution of a <code class="docutils literal notranslate"><span class="pre">coroutine</span></code>.</p>
<p>If a task with <code class="docutils literal notranslate"><span class="pre">task_id</span></code> already exists, close <code class="docutils literal notranslate"><span class="pre">coroutine</span></code> instead of scheduling it. This
prevents unawaited coroutine warnings. Don’t pass a coroutine that’ll be re-used elsewhere.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>task_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Hashable" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Hashable</span></code></a>) – A unique ID to create the task with.</p></li>
<li><p><strong>coroutine</strong> (<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Coroutine" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Coroutine</span></code></a>) – The function to be called.</p></li>
</ul>
</dd>
<dt class="field-even">Return type</dt>
<dd class="field-even"><p><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.10)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">None</span></code></a></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="botcore.utils.scheduling.Scheduler.schedule_at">
<span class="sig-name descname"><span class="pre">schedule_at</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">time</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">task_id</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">coroutine</span></span></em><span class="sig-paren">)</span><a class="reference external" href="https://github.com/python-discord/bot-core/blob/bc0a470dcd99007581975f23efabbda9266dac9d/botcore/utils/scheduling.py#L82-L105"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#botcore.utils.scheduling.Scheduler.schedule_at" title="Permalink to this definition">#</a></dt>
<dd><p>Schedule <code class="docutils literal notranslate"><span class="pre">coroutine</span></code> to be executed at the given <code class="docutils literal notranslate"><span class="pre">time</span></code>.</p>
<p>If <code class="docutils literal notranslate"><span class="pre">time</span></code> is timezone aware, then use that timezone to calculate now() when subtracting.
If <code class="docutils literal notranslate"><span class="pre">time</span></code> is naïve, then use UTC.</p>
<p>If <code class="docutils literal notranslate"><span class="pre">time</span></code> is in the past, schedule <code class="docutils literal notranslate"><span class="pre">coroutine</span></code> immediately.</p>
<p>If a task with <code class="docutils literal notranslate"><span class="pre">task_id</span></code> already exists, close <code class="docutils literal notranslate"><span class="pre">coroutine</span></code> instead of scheduling it. This
prevents unawaited coroutine warnings. Don’t pass a coroutine that’ll be re-used elsewhere.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>time</strong> (<a class="reference external" href="https://docs.python.org/3/library/datetime.html#datetime.datetime" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a>) – The time to start the task.</p></li>
<li><p><strong>task_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Hashable" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Hashable</span></code></a>) – A unique ID to create the task with.</p></li>
<li><p><strong>coroutine</strong> (<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Coroutine" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Coroutine</span></code></a>) – The function to be called.</p></li>
</ul>
</dd>
<dt class="field-even">Return type</dt>
<dd class="field-even"><p><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.10)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">None</span></code></a></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="botcore.utils.scheduling.Scheduler.schedule_later">
<span class="sig-name descname"><span class="pre">schedule_later</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">delay</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">task_id</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">coroutine</span></span></em><span class="sig-paren">)</span><a class="reference external" href="https://github.com/python-discord/bot-core/blob/bc0a470dcd99007581975f23efabbda9266dac9d/botcore/utils/scheduling.py#L106-L124"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#botcore.utils.scheduling.Scheduler.schedule_later" title="Permalink to this definition">#</a></dt>
<dd><p>Schedule <code class="docutils literal notranslate"><span class="pre">coroutine</span></code> to be executed after <code class="docutils literal notranslate"><span class="pre">delay</span></code> seconds.</p>
<p>If a task with <code class="docutils literal notranslate"><span class="pre">task_id</span></code> already exists, close <code class="docutils literal notranslate"><span class="pre">coroutine</span></code> instead of scheduling it. This
prevents unawaited coroutine warnings. Don’t pass a coroutine that’ll be re-used elsewhere.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>delay</strong> (<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Union" title="(in Python v3.10)"><code class="xref py py-data docutils literal notranslate"><span class="pre">Union</span></code></a>[<a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">int</span></code></a>, <a class="reference external" href="https://docs.python.org/3/library/functions.html#float" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">float</span></code></a>]) – How long to wait before starting the task.</p></li>
<li><p><strong>task_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Hashable" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Hashable</span></code></a>) – A unique ID to create the task with.</p></li>
<li><p><strong>coroutine</strong> (<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Coroutine" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Coroutine</span></code></a>) – The function to be called.</p></li>
</ul>
</dd>
<dt class="field-even">Return type</dt>
<dd class="field-even"><p><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.10)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">None</span></code></a></p>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="botcore.utils.scheduling.create_task">
<span class="sig-name descname"><span class="pre">create_task</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">coro</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">suppressed_exceptions</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">()</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">event_loop</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="reference external" href="https://github.com/python-discord/bot-core/blob/bc0a470dcd99007581975f23efabbda9266dac9d/botcore/utils/scheduling.py#L211-L239"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#botcore.utils.scheduling.create_task" title="Permalink to this definition">#</a></dt>
<dd><p>Wrapper for creating an <a class="reference external" href="https://docs.python.org/3/library/asyncio-task.html#asyncio.Task" title="(in Python v3.10)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">asyncio.Task</span></code></a> which logs exceptions raised in the task.</p>
<p>If the <code class="docutils literal notranslate"><span class="pre">event_loop</span></code> kwarg is provided, the task is created from that event loop,
otherwise the running loop is used.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>coro</strong> (<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Awaitable" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Awaitable</span></code></a>) – The function to call.</p></li>
<li><p><strong>suppressed_exceptions</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#tuple" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">tuple</span></code></a>[<a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Type" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Type</span></code></a>[<a class="reference external" href="https://docs.python.org/3/library/exceptions.html#Exception" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Exception</span></code></a>]]) – Exceptions to be handled by the task.</p></li>
<li><p><strong>event_loop</strong> (<a class="reference external" href="https://docs.python.org/3/library/asyncio-eventloop.html#asyncio.AbstractEventLoop" title="(in Python v3.10)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">asyncio.AbstractEventLoop</span></code></a>) – The loop to create the task from.</p></li>
<li><p><strong>kwargs</strong> – Passed to <a class="reference external" href="https://docs.python.org/3/library/asyncio-task.html#asyncio.create_task" title="(in Python v3.10)"><code class="xref py py-func docutils literal notranslate"><span class="pre">asyncio.create_task()</span></code></a>.</p></li>
</ul>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><p>The wrapped task.</p>
</dd>
<dt class="field-odd">Return type</dt>
<dd class="field-odd"><p><a class="reference external" href="https://docs.python.org/3/library/asyncio-task.html#asyncio.Task" title="(in Python v3.10)">asyncio.Task</a></p>
</dd>
</dl>
</dd></dl>
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