title: How to get values from Dtype object in a dataframe
body: <p>I have a dataframe with this column structure: </p>
  
  <pre><code>&lt;pre&gt;
  In [179]: df.dtypes
  Out[179]: 
  layer         int32
  row           int32
  column        int32
  segment       int32
  reach         int32
  Qin         float64
  Qaquifer    float64
  Qout        float64
  Qovr        float64
  Qprecip     float64
  Qet         float64
  stage       float64
  depth       float64
  width       float64
  Cond        float64
  Qwt         float64
  deltaUZ     float64
  GWh         float64
  kstpkper     object
  k             int32
  i             int32
  j             int32
  dtype: object
  
  In [180]: df.kstpkper
  Out[180]: 
  0          (0, 0)
  1          (0, 0)
  2          (0, 0)
  3          (0, 0)
  4          (0, 0)
  5          (0, 0)
              ...
  18207    (35, 10)
  18208    (35, 10)
  18209    (35, 10)
  18210    (35, 10)
  18211    (35, 10)
  18212    (35, 10)
  Name: kstpkper, dtype: object
  &lt;/pre&gt;
  </code></pre>
  
  <p>I would like to split kstpkper variable in two and add them to my dataframe.  Is it possible?</p>
  
  <p>How can I call each element in kstpkper variable?</p>
  
  <p>Any help would be appreciated. </p>