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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 get_default(self, create=True):
 """ Get the default bridge network that containers are connected to if no other network options are specified. :param create: Whether or not to create the network if it doesn't already exist. """

        if self._default_network is None and create:
            log.debug("Creating default network...")
            self._default_network = self.create('default', driver='bridge')

        return self._default_network