title: How to create a list in Python with the unique values of a CSV file?
body: <p>I have CSV file that looks like the following, </p>
  
  <pre><code>1994, Category1, Something Happened 1
  1994, Category2, Something Happened 2
  1995, Category1, Something Happened 3
  1996, Category3, Something Happened 4
  1998, Category2, Something Happened 5
  </code></pre>
  
  <p>I want to create two lists, </p>
  
  <pre><code>Category = [Category1, Category2, Category3]
  </code></pre>
  
  <p>and</p>
  
  <pre><code>Year = [1994, 1995, 1996, 1998]
  </code></pre>
  
  <p>I want to omit the duplicates in the column. I am reading the file as following, </p>
  
  <pre><code>DataCaptured = csv.reader(DataFile, delimiter=',')  
  DataCaptured.next()
  </code></pre>
  
  <p>and Looping through, </p>
  
  <pre><code>   for Column in DataCaptured:
  </code></pre>