title: Adding two strings together in python
body: <p>I'm trying to place two strings together but when I run this code I keep getting an error.
  I'm sure this is something basic but I ahave been playing with this for 30 minutes and can't figure out what's wrong</p>
  
  <pre><code>filename= 'data.txt'
  1output = '1min' + filename
  </code></pre>