Error iterating through a Pandas series
<p>When I get the first and second elements of this series, it works OK, but from element 3 onwards, giving an error when I try to fetch.</p>

<pre><code>type(X_test_raw)
Out[51]: pandas.core.series.Series

len(X_test_raw)
Out[52]: 1393

X_test_raw[0]
Out[45]: 'Go until jurong point, crazy.. Available only in bugis n great world la e buffet... Cine there got amore wat...'

X_test_raw[1]
Out[46]: 'Ok lar... Joking wif u oni...'

X_test_raw[2]
</code></pre>

<blockquote>
  <p>KeyError: 2</p>
</blockquote>