Python'的名称是什么;谁是根记录器?
下面是关于登录Python的基本教程,以及iPython控制台中的步骤。如上所述,根记录器的默认级别为Python'的名称是什么;谁是根记录器?,python,logging,Python,Logging,下面是关于登录Python的基本教程,以及iPython控制台中的步骤。如上所述,根记录器的默认级别为警告: In [1]: import logging In [2]: logging.warning('Watch out!') WARNING:root:Watch out! In [3]: logging.info('I told you so') 我想显式地将根记录器的级别设置为INFO。我尝试使用name='root'进行此操作,但没有明显效果: In [4]: logging.g
警告
:
In [1]: import logging
In [2]: logging.warning('Watch out!')
WARNING:root:Watch out!
In [3]: logging.info('I told you so')
我想显式地将根记录器的级别设置为INFO
。我尝试使用name='root'
进行此操作,但没有明显效果:
In [4]: logging.getLogger('root').setLevel(logging.INFO)
In [5]: logging.info('I told you so')
如果不带参数调用logging.getLogger()
,我可以设置根记录器的级别:
In [6]: logging.getLogger().setLevel(logging.INFO)
In [7]: logging.info('I told you so')
INFO:root:I told you so
不过,我很好奇,为什么这第一次不起作用?由于其name
属性为“root”,因此这似乎应该可以工作:
In [12]: root_logger = logging.getLogger()
In [14]: root_logger.name
Out[14]: 'root'
简言之,如果我不想依赖默认设置,我会传递什么名称到
logging.getLogger()
,以获取根记录器?根记录器的名称是root
,但您不能按名称访问根记录器
检查表明:
def __init__(self, root):
"""
Initialize the manager with the root node of the logger hierarchy.
"""
self.root = root
self.disable = 0
self.emittedNoHandlerWarning = 0
self.loggerDict = {}
root
与loggerDict
分开存储,这是所有命名记录器所在的位置
def getLogger(name=None):
"""
Return a logger with the specified name, creating it if necessary.
If no name is specified, return the root logger.
"""
if name:
return Logger.manager.getLogger(name)
else:
return root
您可以按照manager.getLogger
内部函数查找它无法找到的根目录
:
def getLogger(self, name):
"""
Get a logger with the specified name (channel name), creating it
if it doesn't yet exist. If a PlaceHolder existed for the specified
name [i.e. the logger didn't exist but a child of it did], replace
it with the created logger and fix up the parent/child references
which pointed to the placeholder to now point to the logger.
"""
rv = None
_acquireLock()
try:
if self.loggerDict.has_key(name):
rv = self.loggerDict[name]
if isinstance(rv, PlaceHolder):
ph = rv
rv = _loggerClass(name)
rv.manager = self
self.loggerDict[name] = rv
self._fixupChildren(ph, rv)
self._fixupParents(rv)
else:
rv = _loggerClass(name)
rv.manager = self
self.loggerDict[name] = rv
self._fixupParents(rv)
finally:
_releaseLock()
return rv
根记录器具有
name
属性,但它没有与您定义的其他记录器一起存储在字典中,因此无法通过getLogger()