title: Combination of values in pandas data frame
body: <p>This is my pandas dataframe:</p>
  
  <pre><code>       Item          Support_Count
  0      BREAD              4
  1      MILK               4
  2      DIAPER             4
  3      BEER               3
  </code></pre>
  
  <p>How will i generate all possible unique combinations of 2 and 3 set of items from the 1st column 'Item'. </p>
  
  <p>Example(2 item sets):
  (BREAD,MILK)
  ,(BREAD,DIAPER),(BREAD,BEER),(MILK,DIAPER) etc.</p>
  
  <p>Example (3 item sets):
  (BREAD,MILK,DIAPER),(BREAD,MILK,BEER),(MILK,DIAPER,BEER) etc. </p>