我正在尝试减少 napalm
库发送到 syslog 的日志记录量,但也允许从代码的其他部分发送 info
日志。我将 logging.basicConfig
设置为 INFO
,但随后我希望 napalm
函数为 WARNING
及以上。
所以我有这样的代码:
from napalm import get_network_driver
import logging
import getpass
logging.basicConfig(
filename="/var/log/myscripts/script.log", level=logging.INFO, format="%(asctime)s %(message)s")
def napalm(device):
logging.getLogger().setLevel(logging.WARNING)
username = getpass.getuser()
driver = get_network_driver("junos")
router = driver(str(device), username, "", password="", timeout=120)
router.open()
return router
router = napalm('myrouter')
config = "hostname foobar"
router.load_merge_candidate(config=config)
show = router.compare_config()
logging.info(show)
问题是 logging.info
输出从未进入日志文件。如果我这样做 logging.warning(show)
它确实如此,但我希望这是 info
。我希望函数是 WARNING
的原因是它在 info
级别生成了很多其他日志记录,这只是噪音。所以试图减少这种情况。
答案 0 :(得分:1)
《Effective Python》一书中的一个不错的技巧。看看它是否对您的情况有帮助。
def napalm(count):
for x in range(count):
logger.info('useless log line')
@contextmanager
def debug_logging(level):
logger = logging.getLogger()
old_level = logger.getEffectiveLevel()
logger.setLevel(level)
try:
yield
finally:
logger.setLevel(old_level)
napalm(5)
with debug_logging(logging.WARNING):
napalm(5)
napalm(5)
答案 1 :(得分:0)
通过不带参数调用 logging.getLogger()
,您当前正在检索根记录器,并且覆盖它的级别也会影响所有其他记录器。
您应该改为检索库的记录器并仅针对该特定记录器覆盖级别。
napalm
库在其 __init__.py
中执行以下操作:
logger = logging.getLogger("napalm")
即图书馆记录器的名字是“凝固汽油弹”。 因此,您应该能够通过在脚本中添加以下行来覆盖该特定记录器的级别:
logging.getLogger("napalm").setLevel(logging.WARNING)
import logging
logging.basicConfig(level=logging.DEBUG, format="%(levelname)s: %(message)s")
A = logging.getLogger("A")
B = logging.getLogger("B")
A.debug("#1 from A gets printed")
B.debug("#1 from B gets printed")
logging.getLogger("A").setLevel(logging.CRITICAL)
A.debug("#2 from A doesn't get printed") # because we've increased the level
B.debug("#2 from B gets printed")
输出:
DEBUG: #1 from A gets printed
DEBUG: #1 from B gets printed
DEBUG: #2 from B gets printed
由于这对您不起作用,可能是因为该库中有许多其他记录器:
$ grep -R 'getLogger' .
napalm/junos/junos.py:log = logging.getLogger(__file__)
napalm/base/helpers.py:logger = logging.getLogger(__name__)
napalm/base/clitools/cl_napalm.py:logger = logging.getLogger("napalm")
napalm/base/clitools/cl_napalm_validate.py:logger = logging.getLogger("cl_napalm_validate.py")
napalm/base/clitools/cl_napalm_test.py:logger = logging.getLogger("cl_napalm_test.py")
napalm/base/clitools/cl_napalm_configure.py:logger = logging.getLogger("cl-napalm-config.py")
napalm/__init__.py:logger = logging.getLogger("napalm")
napalm/pyIOSXR/iosxr.py:logger = logging.getLogger(__name__)
napalm/iosxr/iosxr.py:logger = logging.getLogger(__name__)
然后我会求助于这样的事情(相关:How to list all existing loggers using python.logging module):
# increase level for all loggers
for name, logger in logging.root.manager.loggerDict.items():
logger.setLevel(logging.WARNING)
或者,如果您只是打印各种记录器,识别最嘈杂的记录器,然后将它们一个一个地静音,也许就足够了。