Some of you lost 1 point in HW2 for drawing one balloon with the value 1000, instead of two separate balloons. This error was marked as D3 in the grading table.
It turns out that this may not be an error, in some contexts. In interactive mode, when you execute one command each time, the two 1000's will indeed be in separate balloons, but if you run the whole code from script mode, the two 1000's will be mapped to the same location in memory. This is due to python interpreter's optimization.
Although only 1 point was reduced, we feel it was unjustified. We will therefore return this point to whoever lost it. The updated grades sheet will appear in the site after HW3 is checked.
Have a nice weekend,
The course staff