 <span class="n">_check_digs_</span><span class="p">(</span><span class="n">digs</span><span class="p">)</span>
        <span class="n">dig_name</span> <span class="o">=</span> <span class="sa">f</span><span class="s1">&#39;First_</span><span class="si">{</span><span class="n">digs</span><span class="si">}</span><span class="s1">_Dig&#39;</span>
        <span class="n">exp_array</span><span class="p">,</span> <span class="n">dig_array</span> <span class="o">=</span> <span class="n">_gen_first_digits_</span>