Sudoku

def detectBigCase (coord):
    return [ e // 3 for e in coord ]

def getBounds (n):
    offset = [ e * n for e in (3,3)]
    return list ( map (sum, zip ((0,2), offset)))

def getListCoords (bigCaseCoords):
    x, y = bigCaseCoords
    X = getBounds (x)
    Y = getBounds (y)
    coords = []
    for i in range (X [0], X [1]+1):
        for j in range (Y [0], Y [1]+1):
            coords.append ((i,j))
    return coords

bigCaseCoords = detectBigCase  ((6,3))
coords = getListCoords (bigCaseCoords)
print (coords)