human
Solve the following python programming problem given the following code:
def _bind_events(self) : 
    self.text.bind ('<Button 1>', self.cmd_text_button1) 
    def cmd_up(e) : 
        self.select_prev (silent = False) 
        return 'break' 
self.text.bind ('<Up>', cmd_up) 
    self.text.bind ('<Control-k>', cmd_up) 
    def cmd_pageup(e) : 
        self.select_prev (silent = False, delta = 10) 
        return 'break' 
self.text.bind ('<Prior>', cmd_pageup) 
    def cmd_down(e) : 
        self.select_next (silent = False) 
        return 'break' 
self.text.bind ('<Down>', cmd_down) 
    self.text.bind ('<Control-j>', cmd_pageup) 
    def cmd_pagedown(e) : 
        self.select_next (silent = False, delta = 10) 
        return 'break' 
self.text.bind ('<Next>', cmd_pagedown) 

    
    

    Fix the buggy line: self.text.bind ('<Control-j>', cmd_pageup)
assistant
#Here is Python program to fix the buggy line: self.

self.text.bind ('<Control-j>', cmd_down)