title: converting a dataframe from float64 to object using dtype
body: <p>I have written this function long time but when i tried it now im getting an error message</p>
  <pre><code>def saveToDisk(i):
      print(&quot;saving ***&quot;)
      name='kenos'+str(i)+'.csv'
      d = {'adId':adId, 'Title':title,'Price':prices,'Description':description, 'Location':location,'Ddate Posted':datePosted, 'Location':location, 'Features' : features, 'URL':urlToSave, 'Type' : listingType}
      df = pd.concat([pd.Series(v, name=k) for k, v in d.items()], axis=1 )
      df.to_csv(name,index=False)
      resetAll()
  </code></pre>
  <p>and i get this error message</p>
  <pre><code>&quot;df = pd.concat([pd.Series(v, name=k) for k, v in d.items()], axis=1 )
  DeprecationWarning: The default dtype for empty Series will be 'object' instead of 'float64' in a future version. Specify a dtype explicitly to silence this warning.&quot;
  </code></pre>
  <p>im not really sure how to resolve this issue, i appreciate if i could get any help. thanks</p>