human
Solve the following python programming problem given the following code:
def _test_add_metadata_accept_rule(self, expected) : 
    def verify_add_rule(chain, rule) : 
        self.assertEqual ('INPUT', chain) 
        self.assertEqual (expected, rule) 
self.stubs.Set (linux_net.iptables_manager.ipv4 ['filter'], 'add_rule', self) 
    linux_net.metadata_accept () 

    
    

    Fix the buggy line: self.stubs.Set (linux_net.iptables_manager.ipv4 ['filter'], 'add_rule', self)
assistant
#Here is Python code to fix the buggy line: self.

self.stubs.Set (linux_net.iptables_manager.ipv4 ['filter'], 'add_rule', def verify_add_rule()