title: How to append items of a list to specific columns in a dataframe?
body: <p>Suppose I have a list of strings with n items, say:</p>
  
  <pre><code>    list1 = ['a','b',..'y','z']
  </code></pre>
  
  <p>Instead of appending the entire list to a dataframe (which creates n columns), I just want to append the first item to the first column, the last item to the last column and everything in between combined into the middle column.</p>
  
  <p>I tried </p>
  
  <pre><code>    df = pd.DataFrame(list1)
  </code></pre>
  
  <p>but this creates a separate column for each string item, resulting in n columns</p>
  
  <p>I want the output to be a dataframe of 3 columns such as:</p>
  
  <pre><code>         0       1        2
    0      a     b+c+d+..   z
  </code></pre>
  
  <p>Please help a noob out!</p>