how to reset index pandas dataframe after dropna() pandas dataframe : <p>I"m not sure how to reset index after dropna() </p>

<pre><code>df_all = df_all.dropna()

df_all.reset_index(drop=True)
</code></pre>

<p>but after drop row index  would skip  for example jump from 0,1,2,4  ..</p>
