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from os import stat
from stat import S_ISBLK
from subprocess import (
check_call
)
def is_block_device(path):
'''
Confirm device at path is a valid block device node.
:returns: boolean: True if path is a block device, False if not.
'''
return S_ISBLK(stat(path).st_mode)
def zap_disk(block_device):
'''
Clear a block device of partition table. Relies on sgdisk, which is
installed as pat of the 'gdisk' package in Ubuntu.
:param block_device: str: Full path of block device to clean.
'''
check_call(['sgdisk', '--zap-all', block_device])
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