human
Solve the following python programming problem given the following code:
def __init__(self, colour, height) : 
    Drawable.__init__ (self) 
    cell = HexCell (0, 0, height, { 
        
}, None) 
    def draw_hex(style) : 
        w = cell.width 
        line = brensenham_line (* (cell.bottomleft + cell.left)) 
        mx = max ([x for (x, y) in line]) 
        glBegin (GL_LINES) 
        for (x, y) in line : 
            glVertex2f (x, y) 
            glVertex2f ((w - x), y) 
            if x : 
                glVertex2f ((mx - x), (y + (height / 2))) 
                glVertex2f (((w - mx) + x), (y + (height / 2))) 
glEnd () 
self._style = DrawStyle (color = draw_hex, draw_func = draw_hex) 

    
    

    Fix the buggy line: self._style = DrawStyle (color = draw_hex, draw_func = draw_hex)
assistant
#Here is Python code to fix the buggy line: self.

self._style = DrawStyle (color = colour, draw_func = draw_hex)