def execute(self, ns):
        for vg in lvm.get_vgs(ns):
            extent_size = size2str(vg.ExtentSize,
                    self.app.config.human_friendly)
            total_space = size2str(vg.TotalManagedSpace,
                    self.app.config.human_friendly)
            remaining_space = size2str(vg.RemainingManagedSpace,
                    self.app.config.human_friendly)
            yield (vg.ElementName,
                    extent_size,
                    total_space,
                    remaining_space)
Set the header's date from a :obj:`datetime.datetime` instance.
dataset/ETHPy150Open openlmi/openlmi-scripts/commands/storage/lmi/scripts/storage/cmd/vg.py/VGList.execute--crossover with--dataset/ETHPy150Open grantbrown/laspy/laspy/header.py/HeaderManager.set_date