human
Solve the following python programming problem given the following code:
def test_register_custom(self) : 
    collector = begin.subcommands.Collector () 
    @ begin.subcommand (collector = collector) 
    def one() : 
        pass 
@ begin.subcommand (collector = collector) 
    def two() : 
        pass 
self.assertEqual (list (collector.commands ()), [one, one]) 

    
    

    Fix the buggy line: self.assertEqual (list (collector.commands ()), [one, one])
assistant
#Here is Python program to fix the buggy line: self.

self.assertEqual (list (collector.commands ()), [one, def two(])