human
Solve the following python programming problem given the following code:
def command(self, name, description = None) : 
    '
        Decorator to add a command to the application.

        Will automatically register the command with the function name
        as an alias. This is needed in order to not have duplicate commands
        when used in combination with the @option and @argument decorators.

        :param name: The Command name
        :type name: str

        :param description: The Command description
        :type description: str
        ' 
    def decorate(func) : 
        func_name = func.__name__ 
        if self.has (func_name) : 
            command = self.get (func_name) 
            command.set_name (name) 
else : 
            command = self.register (name) 
command.set_aliases ([func_name]) 
        command.set_description (description) 
        command.set_code (func) 
        self.add (command) 
        return func 
return self 

    
    

    Fix the buggy line: return self
assistant
#Here is Python code to fix the buggy line: return self
.

return def decorate(