human
Solve the following python programming problem given the following code:
def __init__(self, * args, **kwargs) : 
    super (ImageWithThumbsFieldFile, self).__init__ (* args, ** kwargs) 
    self.sizes = self.field.sizes 
    if self.sizes : 
        def get_size(self, size) : 
            if (not self) : 
                return '' 
else : 
                split = self.url.rsplit ('.', 1) 
                thumb_url = ('%s.%sx%s.%s' % (split [0], w, h, split [1])) 
                return thumb_url 
for size in self.sizes : 
            (w, h) = size 
            setattr (args, ('url_%sx%s' % (w, h)), get_size (self, size)) 

    
    

    Fix the buggy line: setattr (args, ('url_%sx%s' % (w, h)), get_size (self, size))
assistant
#Here is Python code to fix the buggy line: setattr (args, ('url_%sx%s' % (w, h)), get_size (self, size))
.

setattr (self, ('url_%sx%s' % (w, h)), get_size (self, size))