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PO2d lists replacing objects
 

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    <p>I'm trying to make a board game with python 3 using the pygame library. What I'm trying to do is create an x by y 2d list of objects which I've termed spaces to represent the board. First I initialize all of the spaces with the color as gray and the is_piece attribute set to False, indicating that they are all empty spaces. Then I want to replace the empty spaces with pieces by replacing the board[x][y] values with objects that have the is_piece attribute set to true.</p> <p>The bug that I'm having is that the self.coords values are getting flipped. For example, in the below code, the stone object with the [2, 3] self.coords value is ending up in the board[3][2] position, and visa versa. Adding more stones also screws up the self.coords by flipping the index values and sometimes subsequently adding one to one of them.</p> <pre><code>def initialize_board(): #creates an array of empty spaces representing the board board = [[Space(GRAY, RADIUS, [x, y], False) for x in range(BOARDWIDTH)] for y in range(BOARDHEIGHT) #Create the center stones board[3][3] = Space(RED, RADIUS, [3, 3], True) board[2][3] = Space(RED, RADIUS, [2, 3], True) board[4][3] = Space(RED, RADIUS, [4, 3], True) board[3][2] = Space(RED, RADIUS, [3, 2], True) board[3][4] = Space(RED, RADIUS, [3, 4], True) </code></pre> <p>Here's the <strong>init</strong> method of the Space class that I'm using:</p> <pre><code>def __init__(self, color, size, coords, is_stone): self.color = color self.size = size self.coords = coords self.is_stone = is_stone #false if empty self.pos = [CCONSTANT + DISTANCE * self.coords[0], CCONSTANT + DISTANCE * self.coords[1]] </code></pre> <p>Can anyone tell me what I'm messing up?</p>
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    1. USMike Müller
    1. USFred the Fantastic
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    1. COits expecting coord to be of form (x,y) but 2d arrays are typically [row][col] (eg (y,x) ) ... so you need to flip how you are giving it coords
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      1. USJoran Beasley
    2. CO@JoranBeasley: Change your comment to an answer.
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      1. USMarcelo Cantos
    3. COI'd do away with the whole problem by using a dict instead of a list-of-lists, with keys that are tuples `(x, y)`.
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      1. USArmin Rigo
 

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