uot;&quot;&quot;memory_usage: for measurement of memory usage.</span>

<span class="sd">Uses non-standard `psutil` package, self-disables if not available.</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">from</span><span class="w"> </span><span class="nn">..nls</span><span class="w"> </span><span class="kn">import</span> <span class="n">_</span>
<span class="kn">from</span><span class="w"> </span><span class="nn">.gensys_diagnostics</span><span class="w"> </span><span class="kn">import</s