title: AttributeError: 'int' object has no attribute 'plot' in pandas
body: <p>I tried to visualize the nulls values in each column but got the error: <code>AttributeError: 'int' object has no attribute 'plot'.</code></p>
  
  <pre><code>
  columns_with_null = ['ACCTAGE', 'PHONE', 'POS','INV','INVBAL','POSAMT', 'CC', 'CCBAL','HMOWN'
                      'CCPURC', 'INCOME', 'LORES', 'HMVAL', 'AGE','CRSCORE']
  
  for col in columns_with_null:
  
      print('COLUMN:', col)
      print('percent of nulls:', df[col].isna().sum()/len(df))
  
      # Viz the value counts
      df[col].isna().sum()/len(df).plot(kind='barh')
      plt.show()
  </code></pre>