human
Solve the following python programming problem given the following code:
@ convert ('convert test.png +matte -fx Gold  color_fx_constant.miff') 
def test_color_fx_constant(ctx) : 
    gold = RGBColor.parse ('gold') 
    @ image_filter 
    def gold_filter(self, * a) : 
        return gold 
img = get_image ('test.png') 
    img [0].translucent = False 
    img = gold_filter (* img) 
    ctx.compare (gold_filter, 'color_fx_constant.miff') 

    
    

    Fix the buggy line: ctx.compare (gold_filter, 'color_fx_constant.miff')
assistant
#Here is Python program to fix the buggy line: ctx.

ctx.compare (img, 'color_fx_constant.miff')