human
Solve the following python programming problem given the following code:
def iterboxed(self, rows) : 
    'Iterator that yields each scanline in boxed row flat pixel
        format.  `rows` should be an iterator that yields the bytes of
        each row in turn.
        ' 
    def asvalues(raw) : 
        'Convert a row of raw bytes into a flat row.  Result will
            be a freshly allocated object, not shared with
            argument.
            ' 
        if (self.bitdepth == 8) : 
            return array ('B', raw) 
if (self.bitdepth == 16) : 
            raw = tostring (raw) 
            return array ('H', struct.unpack (('!%dH' % (len (raw) // 2)), raw)) 
assert (self.bitdepth < 8) 
        width = self.width 
        spb = (8 // self.bitdepth) 
        out = array ('B') 
        mask = ((2 ** self.bitdepth) - 1) 
        shifts = [(self.bitdepth * i) for i in reversed (list (range (spb)))] 
        for o in raw : 
            out.extend ([(mask & (o >> i)) for i in shifts]) 
return out [: width] 
return map (asvalues, asvalues) 

    
    

    Fix the buggy line: return map (asvalues, asvalues)
assistant
#Here is Python program to fix the buggy line: return map (asvalues, asvalues)
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return map (asvalues, rows)