t;&quot;</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">proj</span> <span class="o">=</span> <span class="n">proj</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">proj</span><span class="p">,</span> <span class="n">Proj</span><span class="p">)</span> <span class="k">else</span> <span class="n">Proj</span><span class="p">(</span><span class="n">proj</span><span class="p">,</span> <span class="n">preserve_units</span