Need some explanation in python arrays
<p>I am converting a python algorithm to c#, and I need some explanation. So I have this list of lists: </p>

<pre><code>offsets2 = [[(0.1, 0.1), (0.5, 0.1), (0.9, 0.1), (1.1, 0.1)],
            [(0.1, 0.5), (0.5, 0.5), (0.9, 0.5), (1.1, 0.5)],
            [(0.1, 0.9), (0.5, 0.9), (0.9, 0.9), (1.1, 0.9)],
            [(0.1, 1.0), (0.5, 1.0), (0.9, 1.0), (1.1, 1.0)]]
</code></pre>

<p>and this: </p>

<pre><code>for offset in offsets2:
    offset = [(int(x + lane.width * dx), 
               int(y + self.canvas.row_height * dy))
              for dx, dy in offset]
</code></pre>

<p>and I am wondering what dx and dy are? I am guessing it's delta x and delta y, but just want to make sure, and also ask how to get them in c#.</p>
