title: Remove white space from entire DataFrame
body: <p>i have a dataframe, 22 columns and 65 rows. The data comes in from csv file.
  Each of the values with dataframe has an extra unwanted whitespace. So if i do a loop on 'Year' column with a Len() i get</p>
  
  <pre><code>2019  5
  2019  5
  2018  5
  ...
  </code></pre>
  
  <p>this 1 extra whitespace appears throughout DF in every value. I tried running a .strip() on DF but no attribute exists</p>
  
  <p>i tried a 'for each df[column].str.strip() but there are various data types in each column... dtypes: float64(6), int64(4), object(14) , so this errors.</p>
  
  <p>any ideas on how to apply a function for entire dataframe, and if so, what function/method? if not what is best way to handle?</p>