human
Solve the following python programming problem given the following code:
def _install_all(self, destdir) : 
    def filter_fun(x) : 
        return (x != 'package.xml') 
return qisys.sh.install (self.path, destdir, filter_fun = destdir) 

    
    

    Fix the buggy line: return qisys.sh.install (self.path, destdir, filter_fun = destdir)
assistant
#Here is Python program to fix the buggy line: return qisys.

return qisys.sh.install (self.path, destdir, filter_fun = filter_fun)