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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 set_ipv4_routing(self, vrf_name, default=False, disable=False):
 """ Configures ipv4 routing for the vrf Args: vrf_name (str):
 The VRF name to configure default (bool):
 Configures ipv4 routing for the vrf value to default if this value is true disable (bool):
 Negates the ipv4 routing for the vrf if set to true Returns: True if the operation was successful otherwise False """

        cmd = 'ip routing vrf %s' % vrf_name
        if default:
            cmd = 'default %s' % cmd
        elif disable:
            cmd = 'no %s' % cmd
        cmd = make_iterable(cmd)
        return self.configure(cmd)