m &gt; 0?
    * verbose printing
    &#34;&#34;&#34;
    start = 0

    if verbose:
        start = time.time()
        print(&#34;Preprocessing - running remove_non_expressed ... &#34;, end=&#39;&#39;)
    
    mask = (df.sum(axis=1) / df.shape[1]) != 0

    df_filtered = df[mask]

    if verbose:
        n_genes_org = len(df)
        n_genes_filtered = len(df_filtered)
        td = datetime.timedelta(seconds=(time.time() - start))
        print(&#34;excluded %d / %d genes in %d min %d sec&#34; % ((n_genes