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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def default_settings(params):
 """Adds default values to settings if it not presented. Usage: @default_settings({'apt': '/usr/bin/apt'}) def match(command):
 print(settings.apt) """

    def _default_settings(fn, command):
        for k, w in params.items():
            settings.setdefault(k, w)
        return fn(command)
    return decorator(_default_settings)