title: How to covert a list of lists into dataframe and make the first element of the lists as the index
body: <p>The sample data of mine may be seen here:</p>
  
  <pre><code>data=[['Australia',100],['France',200],['Germany',300],['America',400]]
  </code></pre>
  
  <p>What I expect may be the dataframe like this:</p>
  
  <pre><code>           volume
  Australia     100
  France        200
  Germany       300
  America       400
  </code></pre>
  
  <p>And I've tried the following:</p>
  
  <pre><code>pd.DataFrame(data,columns=['Country','Volume']) 
       Country  Volume
  0  Australia     100
  1     France     200
  2    Germany     300
  3    America     400
  
  pd.DataFrame.from_items()
  </code></pre>
  
  <p>Howerver, I still can't get the expected result?</p>
  
  <p>Is there a possible way that I can get the expected pandas dataframe structure?
  Thanks for all your kindly checking in advance.</p>