title: adding row from one dataframe to another
body: <p>I am trying to insert or add from one dataframe to another dataframe. I am going through the original dataframe looking for certain words in one column. When I find one of these terms I want to add that row to a new dataframe.</p>
  
  <p>I get the row by using.
  <code>entry = df.loc[df['A'] == item]</code> 
   But when trying to add this row to another dataframe using .add, .insert, .update or other methods i just get an empty dataframe.</p>
  
  <p>I have also tried adding the column to a dictionary and turning that into a dataframe but it writes data for the entire row rather than just the column value. So is there a way to add one specific row to a new dataframe from my existing variable ?</p>