<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def is_partial(self):
 """ Returns True if the VG is partial, False otherwise. """

        self.open()
        part = lvm_vg_is_partial(self.handle)
        self.close()
        return bool(part)