ok, now I have tested this more thoroughly, and it seems i can only do the grid[x][y] function up to grid[9][9], when i really should be able to be doing up to grid[10][20]. What exactly is the function of this row_squares list?
On Wed, May 15, 2013 at 4:35 PM, Andrew Bradley <abradley...@gmail.com>wrote: > Now I want to show you what I have written: > > row = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10) > column = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, > 18, 19, 20) > SQUARESIZE = 43 > > grid = [] > for row in range(10): > row_squares = [] > for column in range(20): > rect = Rect(12 + column * SQUARESIZE, 10 + row * SQUARESIZE, > SQUARESIZE, SQUARESIZE) > row_squares.append(rect) > grid.append(row_squares) > > It appears to be working (that is, the program still runs without > crashing). So now, how can I utilize this new grid list? Thank you for the > help so far, I feel like the entire grid is now being worked out. > -Andrew > > > > On Wed, May 15, 2013 at 3:57 PM, Dave Angel <da...@davea.name> wrote: > >> On 05/15/2013 02:14 PM, Andrew Bradley wrote: >> >> Please reply on the list, not privately, unless it's something like a >> simple thank-you. Typically, you'd do a reply-all, then delete the people >> other than the list itself. Or if you're using Thunderbird, you could just >> reply-list. >> >> > Thank you very much for your response: it seems excellent, but I'm >> afraid I >> > do not understand it fully. Your code here: >> >> > >> > maxrows = 10 >> > maxcols = 20 >> > grid = [] >> > for row in range(maxrows): >> > rowdata = [] >> > for column in range(maxcols): >> > arg1 = ... >> > arg2 = ... >> > arg3 = ... >> > arg4 = ... >> > rowdata.append(pygame.Rect(arg >> > 1, arg2, arg3, arg4) >> > grid.append(rowdata) >> > >> > Seems very good, but keep in mind I just started programming last week, >> and >> > this is hard for me to wrap my head around. Do I really just write grid >> = >> > []? or is this like a def grid(): function? >> >> This code was intended to replace the 200 lines you started, A1= >> pygame... A2= A3= etc. I'd have put them inside a function, but this is >> just one of the things I'd have initialized in such a function. grid is a >> list of lists, not a function. >> >> >> > What do you mean by rowdata = []? >> >> [] is the way you define an empty list. Another way might be: >> rowdata = list() >> >> >> > And how exactly would I make the formula for a rect call? >> >> Well, for row==0 and col==0, you say you wanted 10, 12, 43, and 43 for >> the four parameters. But you never said how you were going to (manually) >> calculate those numbers for other cells. Only once you've decided that can >> you fill in "formulas" for arg1 and arg2. I suspect that arg3 and arg4 are >> simply 43 and 43 respectively, since you want all the cells to be the same >> size. >> >> taking my clue from Ian, I might try: >> >> x_offset = 10 >> y_offset = 12 >> width = height = 43 >> arg1 = column * width + x_offset >> arg2 = row * height + y_offset >> arg3 = width >> arg4 = height >> >> That assumes that there is no gap between cells in this grid. If you >> want a gap, then the width value used in the arg1 formula would be more >> than 43 (width). Likewise the height value used in the arg2 formula would >> be more than 43 (height). >> >> > If there's a good website for these kind of details, I would appreciate >> that too. >> >> You cannot begin to write a non-trivial program in Python without >> understanding lists pretty thoroughly. Perhaps you should start with Alan >> Gauld's tutorial, which doesn't assume previous programming experience. >> http://www.alan-g.me.uk/ >> >> I haven't studied it, as Python was about my 35th programming language. >> But he's very active on Python-tutor, and explains things very well. So >> his website is probably very good as well. >> >> Now, as you can see from Ian's message, writing a game using pygame will >> require quite a bit of other understanding. He demonstrates with classes >> to represent cells, which is indeed what I'd do. But I suspect you're not >> nearly ready to consider writing classes. (You use classes all the time. >> For example, 5 is an instance of class int.) >> >> >> -- >> DaveA >> >> >> >> -- >> DaveA >> -- >> http://mail.python.org/**mailman/listinfo/python-list<http://mail.python.org/mailman/listinfo/python-list> >> > >
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