an> <span class="n">line</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span>
                <span class="n">filepath</span> <span class="o">=</span> <span class="sa">f</span><span class="s1">'</span><span class="si">{</span><span class="n">base_directory</span><span class="si">}</span><span class="s1">/</span><span class="si">{</span><span class="n">filename</span><span class="si">}</span><span class="s1">'</span>
                <span class="k">if</span> <span class="ow">no