title: Python equivalent of R's head and tail function
body: <p>I want to preview a Pandas dataframe.  I would use head(mymatrix) in R, but I do not know how to do this in Pandas Python.</p>
  
  <p>When I type </p>
  
  <p>df.head(10) I get...</p>
  
  <pre><code>&lt;class 'pandas.core.frame.DataFrame'&gt;
  Int64Index: 10 entries, 0 to 9
  Data columns (total 14 columns):
  #Book_Date            10  non-null values
  Item_Qty              10  non-null values
  Item_id               10  non-null values
  Location_id           10  non-null values
  MFG_Discount          10  non-null values
  Sale_Revenue          10  non-null values
  Sales_Flg             10  non-null values
  Sell_Unit_Cost        5  non-null values
  Store_Discount        10  non-null values
  Transaction_Id        10  non-null values
  Unit_Cost_Amt         10  non-null values
  Unit_Received_Cost    5  non-null values
  Unnamed: 0            10  non-null values
  Weight                10  non-null values
  </code></pre>