晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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import tuned.monitors
import os
class DiskMonitor(tuned.monitors.Monitor):
_supported_vendors = ["ATA", "SCSI"]
@classmethod
def _init_available_devices(cls):
block_devices = os.listdir("/sys/block")
available = set(filter(cls._is_device_supported, block_devices))
cls._available_devices = available
for d in available:
cls._load[d] = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
@classmethod
def _is_device_supported(cls, device):
vendor_file = "/sys/block/%s/device/vendor" % device
try:
vendor = open(vendor_file).read().strip()
except IOError:
return False
return vendor in cls._supported_vendors
@classmethod
def update(cls):
for device in cls._updating_devices:
cls._update_disk(device)
@classmethod
def _update_disk(cls, dev):
with open("/sys/block/" + dev + "/stat") as statfile:
cls._load[dev] = list(map(int, statfile.read().split()))