title: Python split not recognizing hyphen
body: <p>I imported a table with the years that each coach served as the football coach. Some of the years listed look like this: "1903–1910, 1917, 1919"</p>
  
  <p>I am aiming for [1903, 1904, 1905, 1906, 1907, 1908, 1909, 1910, 1917, 1919]</p>
  
  <p>In my original DataFrame this list is an object.</p>
  
  <p>I have tried:</p>
  
  <p><code>x = "1903–1910, 1917, 1919"</code></p>
  
  <p><code>x[0].split('-')</code></p>
  
  <p><code>re.split(r'\s|-', x[0])</code></p>
  
  <p><code>x[0].replace('-', ' ').split(' ')</code></p>
  
  <p>I keep getting:</p>
  
  <p><code>['1903–1910']</code></p>
  
  <p>What am I doing wrong? Why isn't python finding the hyphen?</p>