title: How to extract element by index in pandas series
body: <p>I am trying to extract a <code>index [1]</code> or <code>month</code> from series but not getting it. Its series from a DataFrame.</p>
  
  <pre><code>x = ltest['Date'].str.split("-")
  
  5659    [2015, 07, 26]
  5696    [2015, 07, 26]
  5783    [2015, 07, 26]
  5833    [2015, 07, 26]
  5836    [2015, 07, 26]
  dtype: object
  
  x[1]   #error
  x[x[1]] #error
  </code></pre>
  
  <p>ltest</p>
  
  <pre><code>    Store   DayOfWeek   Date    Sales   Customers   Open    Promo   StateHoliday    SchoolHoliday
  5659    85  7   2015-07-26  11421   1606    1   0   0   0
  5696    122 7   2015-07-26  5773    707 1   0   0   0
  5783    209 7   2015-07-26  3742    354 1   0   0   0
  5833    259 7   2015-07-26  15998   2857    1   0   0   0
  5836    262 7   2015-07-26  32547   4783    1   0   0   0
  </code></pre>
  
  <p>I am learning pandas. I checked <a href="http://pandas.pydata.org/pandas-docs/stable/api.html" rel="nofollow">api documentation</a>  but weren't able to figure out.</p>