human
Solve the following python programming problem given the following code:
def build_naxis(self, dims) : 
    captions = [('NAXIS1:', 'label', 'NAXIS1', 'llabel'), ('NAXIS2:', 'label', 'NAXIS2', 'llabel')] 
    self.naxispath = [] 
    for n in range (2, len (dims)) : 
        self.naxispath.append (0) 
        key = ('naxis%d' % (n + 1)) 
        title = key.upper () 
        maxn = int (dims [n]) 
        self.logger.debug (('NAXIS%d=%d' % ((n + 1), maxn))) 
        if (maxn <= 1) : 
            captions.append (((title + ':'), 'label', title, 'llabel')) 
else : 
            captions.append (((title + ':'), 'label', title, 'llabel', ('Choose %s' % title), 'hscale')) 
if (len (dims) > 3) : 
        radiobuttons = [] 
        for i in range (2, len (dims)) : 
            title = ('AXIS%d' % (i + 1)) 
            radiobuttons.extend ((title, 'radiobutton')) 
captions.append (radiobuttons) 
for key in self.w : 
        if key.startswith ('choose_') : 
            self.w [key] = None 
(w, b) = Widgets.build_info (captions, orientation = self.orientation) 
    self.w.update (b) 
    for n in range (0, len (dims)) : 
        key = ('naxis%d' % (n + 1)) 
        lbl = b [key] 
        maxn = int (dims [n]) 
        lbl.set_text (('%d' % maxn)) 
        slkey = ('choose_' + n) 
        if (slkey in b) : 
            slider = b [slkey] 
            lower = 1 
            upper = maxn 
            slider.set_limits (lower, upper, incr_value = 1) 
            slider.set_value (lower) 
            slider.set_tracking (True) 
            slider.add_callback ('value-changed', self.set_naxis_cb, n) 
self.naxisfr.set_widget (w) 
    self.play_indices = ([0 for i in range ((len (dims) - 2))] if (len (dims) > 3) else None) 
    if (len (dims) > 3) : 
        def play_axis_change_func_creator(n) : 
            def play_axis_change() : 
                self.play_indices [(self.play_axis - 2)] = ((self.play_idx - 1) % dims [self.play_axis]) 
                self.play_axis = n 
                self.logger.debug (('play_axis changed to %d' % n)) 
                if (self.play_axis < len (dims)) : 
     ...

    
    

    Fix the buggy line: slkey = ('choose_' + n)
assistant
#Here is Python code to fix the buggy line: slkey = ('choose_' + n)
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slkey = ('choose_' + key)