title: AttributeError: 'numpy.ndarray' object has no attribute 'apply'
body: <pre><code>Department = input("Is there a list you would like to view")
  
  
  readfile = pd.read_csv('6.csv')
  filevalues= readfile.loc[readfile['Customer'].str.contains(Department, na=False), 'June-18\nQty'] 
  filevalues = filevalues.fillna(int(0))
  
  int_series = filevalues.values.astype(int) 
  calculated_series = int_series.apply(lambda x: filevalues*1.3)
  
  
  print(filevalues)
  </code></pre>
  
  <p>I am getting this error : <code>AttributeError: 'numpy.ndarray' object has no attribute 'apply'</code> </p>
  
  <p>I have looked through this website and no solutions seems to work. I simply want to multiply the data by 1.3 in this series. Thank you</p>