title: Split a list of strings by comma
body: <p>I want to convert </p>
  
  <pre><code>['60,78', '70,77', '80,74', '90,75', '100,74', '110,75']
  </code></pre>
  
  <p>in to </p>
  
  <pre><code>['60', '78', '70', '77'.. etc]
  </code></pre>
  
  <p>I thought I could use </p>
  
  <pre><code>for word in lines:
      word = word.split(",")
      newlist.append(word)
  return newlist
  </code></pre>
  
  <p>but this produces this instead:</p>
  
  <pre><code>[['60', '78'], ['70', '77'], ['80', '74'], ['90', '75'], ['100', '74'], ['110', '75']]
  </code></pre>
  
  <p>Can anyone please offer a solution?</p>