title: AttributeError: Can only use .str accessor with string values, which use np.object_ dtype in pandas
body: <p>Str.replace method returns an attribute error. </p>
  
  <pre><code>dc_listings['price'].str.replace(',', '')
  AttributeError: Can only use .str accessor with string values, which use np.object_ dtype in pandas
  </code></pre>
  
  <p>Here are the top 5 rows of my price column. </p>
  
  <p><a href="https://i.stack.imgur.com/DoXiN.png" rel="noreferrer"><img src="https://i.stack.imgur.com/DoXiN.png" alt="enter image description here"></a></p>
  
  <p>This stack overflow <a href="https://stackoverflow.com/questions/33692532/pandas-error-can-only-use-str-accessor-with-string-values">thread recommends</a> to check if my column has NAN values but non of the values in my column are NAN. 
  <a href="https://i.stack.imgur.com/gYOaQ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/gYOaQ.png" alt="enter image description here"></a> </p>