title: What does square brackets on their own represent?
body: <p>Hi I'm just working with adapting some python code and making sure I understand everything within it as I've never really worked with Python before. What does the [0] alone mean in the code mean? (qtable is 2 dimensional array, holding states(s) and actions(a), actions is a list, current_s is an integer)</p>
  
  <p><code>self.q_table[current_s] = ([0] * len(self.actions))</code></p>