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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from functools import wraps
import logging
logger = logging.getLogger('peewee')
class _QueryLogHandler(logging.Handler):
def __init__(self, *args, **kwargs):
self.queries = []
logging.Handler.__init__(self, *args, **kwargs)
def emit(self, record):
# Counts all entries logged to the "peewee" logger by execute_sql().
if record.name == 'peewee':
self.queries.append(record)
class count_queries(object):
def __init__(self, only_select=False):
self.only_select = only_select
self.count = 0
def get_queries(self):
return self._handler.queries
def __enter__(self):
self._handler = _QueryLogHandler()
logger.setLevel(logging.DEBUG)
logger.addHandler(self._handler)
return self
def __exit__(self, exc_type, exc_val, exc_tb):
logger.removeHandler(self._handler)
if self.only_select:
self.count = len([q for q in self._handler.queries
if q.msg[0].startswith('SELECT ')])
else:
self.count = len(self._handler.queries)
class assert_query_count(count_queries):
def __init__(self, expected, only_select=False):
super(assert_query_count, self).__init__(only_select=only_select)
self.expected = expected
def __call__(self, f):
@wraps(f)
def decorated(*args, **kwds):
with self:
ret = f(*args, **kwds)
self._assert_count()
return ret
return decorated
def _assert_count(self):
error_msg = '%s != %s' % (self.count, self.expected)
assert self.count == self.expected, error_msg
def __exit__(self, exc_type, exc_val, exc_tb):
super(assert_query_count, self).__exit__(exc_type, exc_val, exc_tb)
self._assert_count()