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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 register_presets(self, presets, replace=False):
 """Add new presets to this policy object. Merges the presets dictionary ``presets`` into this ``Policy`` object, or replaces the current presets if ``replace`` is ``True``. ``presets`` should be a dictionary mapping ``str`` preset names to ``<class PresetDefaults>`` objects specifying the command line defaults. :param presets: dictionary of presets to add or replace :param replace: replace presets rather than merge new presets. """

        if replace:
            self.presets = {}
        self.presets.update(presets)