title: does pandas keep the order of rows when reading a file?
body: <p>I have a large dataset, that I need to fetch some data with the help of URLs it holds, by the help of a loop through the indexes. I want to know if pandas keep the row order when reading a CSV file, according to the file order, so I can cut the rest and start from where it is left off.</p>
  <pre class="lang-py prettyprint-override"><code>df_contri_rep = pd.read_csv('contri_rep.csv',usecols=['url'])
  </code></pre>
  <p>If not, is there an option for this?</p>