For Append To Extend¶
Sourcery refactoring id:
Replace a for append loop with list extend
games =  for i in range(10): for j in range(10): if i != j: games.append(play(i, j))
games =  for i in range(10): games.extend(play(i, j) for j in range(10) if i != j)
Instead of looping through an iterator and appending to the list, we can make the intent clearer by explicitly stating that we are extending this list.