title: Pandas plot multiple columns on a single bar chart
body: <p>I'm trying to plot multiple columns onto a single bar chart. </p>
  
  <p>First, I defined them: </p>
  
  <pre><code>public_action_sum = df['Q17.4_1'].sum()    
  testified_sum = df['Q17.4_4'].sum()
  met_el_sum = df['Q17.4_5'].sum()
  ... 
  </code></pre>
  
  <p>and then merged those sums into a single dataframe: 
      <code>actions_combined = [public_action_sum, testified_sum, met_el_sum, policy_sum, bill_sum]</code></p>
  
  <p>I'm trying to use <code>pandas.DataFrame.plot.bar</code> and have written: </p>
  
  <pre><code>pd.DataFrame.plot.bar(x['Q17.4_1','Q17.4_4','Q17.4_5','Q17.4_6','Q17.4_7'],y=actions_combined,rot=0)
  </code></pre>
  
  <p>but am getting the error "missing 1 required positional argument: 'self'</p>
  
  <p>I've spent the last hour and a half trying to figure this iout, and am not sure where I'm going wrong. Thoughts? THANKS!</p>