title: Check if a matrix is square? (Python)
body: <p>I want to test a 2x2 matrix of [[5,6],[7,8]] to see if it's a square.</p>
  
  <p>I run my code and I'm supposed to get True but I got False instead...</p>
  
  <pre><code> def square(sq):
       for element in sq:
           if element:
               return False
           return True
  </code></pre>