title: TypeError: inner() got multiple values for keyword argument 'ax'
body: <p>I tried to run the below code: </p>
  
  <p>Code: </p>
  
  <pre><code>df1=pd.read_excel('F:/MRCS_New_struture/2. EHM_Vanna/2015 Reports/Statistic_Env.xlsx', sheetname='Daitom (2)', header=0, index_col='Year')
  
  
  CaAB=df1.iloc[:5,17:34]; print CaAB
  
  a=[2007, 2008, 2011, 2013, 2015]
  b=[100,200,300,500,22.33]
  
  fig, ax=plt.subplots(2,1)
  
  plt.plot(a, b, 'go-', label='line 1', linewidth=2, ax=ax)
  plt.xticks(a, map(str,a))
  CaAB.plot(kind='bar', ax=ax)
  </code></pre>
  
  <p>And, it generated error (TypeError: inner() got multiple values for keyword argument 'ax'). What's wrong to my code?</p>