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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 _take_action(self):
 """Determines whether to perform the action or not. Checks whether or not an action should be taken. This is determined by the truthy value for the unless parameter. If unless is a callback method, it will be invoked with no parameters in order to determine whether or not the action should be taken. Otherwise, the truthy value of the unless attribute will determine if the action should be performed. """

        # Do the action if there isn't an unless override.
        if self.unless is None:
            return True

        # Invoke the callback if there is one.
        if hasattr(self.unless, '__call__'):
            return not self.unless()

        return not self.unless