blocks|key|872529|text|这也应该行得通：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|872530|logging.Formatter(fmt='%25(asctime)s.%25(msecs)03d',datefmt='%25Y-%25m-%25d,%25H:%25M:%25S')|code-block|syntax|javascript|872531|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This should work too: 

<pre><code>logging.Formatter(fmt='%(asctime)s.%(msecs)03d',datefmt='%Y-%m-%d,%H:%M:%S')
</code></pre>

blocks|key|655292|text|在实例化Formatter之后，我通常会设置formatter.converter+=+gmtime。因此，为了让@unutbu的答案在这种情况下起作用，你需要：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|655293|class+MyFormatter(logging.Formatter):
++++def+formatTime(self,+record,+datefmt=None):
++++++++ct+=+self.converter(record.created)
++++++++if+datefmt:
++++++++++++s+=+time.strftime(datefmt,+ct)
++++++++else:
++++++++++++t+=+time.strftime("%25Y-%25m-%25d+%25H:%25M:%25S",+ct)
++++++++++++s+=+"%25s.%2503d"+%25+(t,+record.msecs)
++++++++return+s|code-block|syntax|javascript|655294|entityMap^0|4|9|M|S|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

After instantiating a <code>Formatter</code> I usually set <code>formatter.converter = gmtime</code>. So in order for @unutbu's answer to work in this case you'll need:

<pre><code>class MyFormatter(logging.Formatter):
 def formatTime(self, record, datefmt=None):
 ct = self.converter(record.created)
 if datefmt:
 s = time.strftime(datefmt, ct)
 else:
 t = time.strftime("%Y-%m-%d %H:%M:%S", ct)
 s = "%s.%03d" % (t, record.msecs)
 return s
</code></pre>

blocks|key|872633|text|我发现的最简单的方法是覆盖default_msec_format：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|872634|formatter+=+logging.Formatter('%25(asctime)s')
formatter.default_msec_format+=+'%25s.%2503d'|code-block|syntax|javascript|872635|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The simplest way I found was to override default_msec_format:

<pre><code>formatter = logging.Formatter('%(asctime)s')
formatter.default_msec_format = '%s.%03d'
</code></pre>

blocks|key|872714|text|一个简单的扩展不需要datetime模块，也不像其他一些解决方案那样有障碍，就是使用简单的字符串替换，如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|872715|import+logging
import+time

class+MyFormatter(logging.Formatter):
++++def+formatTime(self,+record,+datefmt=None):
++++++++ct+=+self.converter(record.created)
++++++++if+datefmt:
++++++++++++if+"%25F"+in+datefmt:
++++++++++++++++msec+=+"%2503d"+%25+record.msecs
++++++++++++++++datefmt+=+datefmt.replace("%25F",+msec)
++++++++++++s+=+time.strftime(datefmt,+ct)
++++++++else:
++++++++++++t+=+time.strftime("%25Y-%25m-%25d+%25H:%25M:%25S",+ct)
++++++++++++s+=+"%25s,%2503d"+%25+(t,+record.msecs)
++++++++return+s|code-block|syntax|javascript|872716|这样，即使考虑到区域差异，也可以使用毫秒的%25F随心所欲地编写日期格式。例如：|872717|log+=+logging.getLogger(__name__)
log.setLevel(logging.INFO)

sh+=+logging.StreamHandler()
log.addHandler(sh)

fm+=+MyFormatter(fmt='%25(asctime)s-%25(levelname)s-%25(message)s',datefmt='%25H:%25M:%25S.%25F')
sh.setFormatter(fm)

log.info("Foo,+Bar,+Baz")
#+03:26:33.757-INFO-Foo,+Bar,+Baz|872718|entityMap^0|A|8|0|0|L|2|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

A simple expansion that doesn't require the <code>datetime</code> module and isn't handicapped like some other solutions is to use simple string replacement like so:
<pre><code>import logging
import time

class MyFormatter(logging.Formatter):
 def formatTime(self, record, datefmt=None):
 ct = self.converter(record.created)
 if datefmt:
 if &quot;%F&quot; in datefmt:
 msec = &quot;%03d&quot; % record.msecs
 datefmt = datefmt.replace(&quot;%F&quot;, msec)
 s = time.strftime(datefmt, ct)
 else:
 t = time.strftime(&quot;%Y-%m-%d %H:%M:%S&quot;, ct)
 s = &quot;%s,%03d&quot; % (t, record.msecs)
 return s
</code></pre>
This way a date format can be written however you want, even allowing for region differences, by using <code>%F</code> for milliseconds. For example:
<pre><code>log = logging.getLogger(__name__)
log.setLevel(logging.INFO)

sh = logging.StreamHandler()
log.addHandler(sh)

fm = MyFormatter(fmt='%(asctime)s-%(levelname)s-%(message)s',datefmt='%H:%M:%S.%F')
sh.setFormatter(fm)

log.info(&quot;Foo, Bar, Baz&quot;)
# 03:26:33.757-INFO-Foo, Bar, Baz
</code></pre>

blocks|key|872804|text|如果你正在使用arrow或者如果你不介意使用箭头。您可以用python的时间格式替换箭头的时间格式。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|872805|import+logging

from+arrow.arrow+import+Arrow


class+ArrowTimeFormatter(logging.Formatter):

++++def+formatTime(self,+record,+datefmt=None):
++++++++arrow_time+=+Arrow.fromtimestamp(record.created)

++++++++if+datefmt:
++++++++++++arrow_time+=+arrow_time.format(datefmt)

++++++++return+str(arrow_time)


logger+=+logging.getLogger(__name__)

default_handler+=+logging.StreamHandler()
default_handler.setFormatter(ArrowTimeFormatter(
++++fmt='%25(asctime)s',
++++datefmt='YYYY-MM-DD+HH:mm:ss.SSS'
))

logger.setLevel(logging.DEBUG)
logger.addHandler(default_handler)|code-block|syntax|javascript|872806|现在，您可以在datefmt属性中使用所有arrow's+time+formatting。|style|CODE|872807|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/crsmithdev/arrow|1|http://arrow.readthedocs.io/en/latest/#tokens^0|7|5|0|0|0|7|7|L|N|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|11|8|@$A|12|B|13|K|L]]|9|@$A|14|B|15|1|16]]|C|$]]|$1|M|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

If you are using <a href="https://github.com/crsmithdev/arrow" rel="nofollow noreferrer">arrow</a> or if you don't mind using arrow. You can substitute python's time formatting for arrow's one.

<pre><code>import logging

from arrow.arrow import Arrow


class ArrowTimeFormatter(logging.Formatter):

 def formatTime(self, record, datefmt=None):
 arrow_time = Arrow.fromtimestamp(record.created)

 if datefmt:
 arrow_time = arrow_time.format(datefmt)

 return str(arrow_time)


logger = logging.getLogger(__name__)

default_handler = logging.StreamHandler()
default_handler.setFormatter(ArrowTimeFormatter(
 fmt='%(asctime)s',
 datefmt='YYYY-MM-DD HH:mm:ss.SSS'
))

logger.setLevel(logging.DEBUG)
logger.addHandler(default_handler)
</code></pre>

Now you can use all of <a href="http://arrow.readthedocs.io/en/latest/#tokens" rel="nofollow noreferrer">arrow's time formatting</a> in <code>datefmt</code> attribute.

blocks|key|655627|text|添加msecs是更好的选择，谢谢。以下是我在Blender中使用Python+3.5.3的修订|type|unstyled|depth|inlineStyleRanges|entityRanges|data|655628|import+logging
logging.basicConfig(level=logging.DEBUG,+format='%25(asctime)s.%25(msecs)03d+%25(levelname)s:\t%25(message)s',+datefmt='%25Y-%25m-%25d+%25H:%25M:%25S')
log+=+logging.getLogger(__name__)
log.info("Logging+Info")
log.debug("Logging+Debug")|code-block|syntax|javascript|655629|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Adding msecs was the better option, Thanks.
Here is my amendment using this with Python 3.5.3 in Blender

<pre><code>import logging
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s.%(msecs)03d %(levelname)s:\t%(message)s', datefmt='%Y-%m-%d %H:%M:%S')
log = logging.getLogger(__name__)
log.info("Logging Info")
log.debug("Logging Debug")
</code></pre>

blocks|key|655716|text|对于在这里寻找ISO格式日期的人们，tl;dr：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|655717|与其使用‘%25Y-%25m-%25d%25H：%25M：%25S.%2503d%25z’，不如像@unutbu那样创建你自己的类。以下是iso日期格式的一个示例：|655718|import+logging
from+time+import+gmtime,+strftime

class+ISOFormatter(logging.Formatter):
++++def+formatTime(self,+record,+datefmt=None):
++++++++t+=+strftime("%25Y-%25m-%25dT%25H:%25M:%25S",+gmtime(record.created))
++++++++z+=+strftime("%25z",gmtime(record.created))
++++++++s+=+"%25s.%2503d%25s"+%25+(t,+record.msecs,z)++++++++
++++++++return+s

logger+=+logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

console+=+logging.StreamHandler()
logger.addHandler(console)

formatter+=+ISOFormatter(fmt='%25(asctime)s+-+%25(module)s+-+%25(levelname)s+-+%25(message)s')
console.setFormatter(formatter)

logger.debug('Jackdaws+love+my+big+sphinx+of+quartz.')
#2020-10-23T17:25:48.310-0800+-+<stdin>+-+DEBUG+-+Jackdaws+love+my+big+sphinx+of+quartz.|code-block|syntax|javascript|655719|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

tl;dr for folks looking here for an ISO formatted date:
instead of using something like '%Y-%m-%d %H:%M:%S.%03d%z', create your own class as @unutbu indicated. Here's one for iso date format:
<pre class="lang-py prettyprint-override"><code>import logging
from time import gmtime, strftime

class ISOFormatter(logging.Formatter):
 def formatTime(self, record, datefmt=None):
 t = strftime(&quot;%Y-%m-%dT%H:%M:%S&quot;, gmtime(record.created))
 z = strftime(&quot;%z&quot;,gmtime(record.created))
 s = &quot;%s.%03d%s&quot; % (t, record.msecs,z) 
 return s

logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

console = logging.StreamHandler()
logger.addHandler(console)

formatter = ISOFormatter(fmt='%(asctime)s - %(module)s - %(levelname)s - %(message)s')
console.setFormatter(formatter)

logger.debug('Jackdaws love my big sphinx of quartz.')
#2020-10-23T17:25:48.310-0800 - &lt;stdin&gt; - DEBUG - Jackdaws love my big sphinx of quartz.

</code></pre>

blocks|key|655773|text|如果你更喜欢使用style='{'，fmt="{asctime}.{msecs:0<3.0f}"会将你的微秒数填0到三个位置，以保持一致性。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|655774|entityMap^0|8|9|I|U|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

If you prefer to use <code>style='{'</code>, <code>fmt=&quot;{asctime}.{msecs:0&lt;3.0f}&quot;</code> will 0-pad your microseconds to three places for consistency.

blocks|key|873115|text|在我浪费了一些宝贵的时间后，下面的技巧对我起作用了。我刚刚更新了settings.py中的格式化程序，将datefmt添加为%25y/%25b/%25Y+%25H:%25M:%25S，并将毫秒附加到递增时间，如下所示|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|873116|例如：|873117|++++'formatters':+{
++++++++'verbose':+{
++++++++++++'format':+'[{asctime}.{msecs:0<3.0f}]+{levelname}+[{threadName:s}]+{module}+→+{message}',
++++++++++++'datefmt':+"%25y/%25b/%25Y+%25H:%25M:%25S",
++++++++++++'style':+'{',
++++++++},
++++}|code-block|syntax|javascript|873118|entityMap^0|W|B|1G|7|1Q|H|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|N|$]]

After burning some of my precious time the below hack worked for me. I just updated my formatter in <code>settings.py</code> and added <code>datefmt</code> as <code>%y/%b/%Y %H:%M:%S</code> and appended the milliseconds to the asctime like this <code>{asctime}.{msecs:0&lt;3.0f}</code>
E.G:
<pre><code> 'formatters': {
 'verbose': {
 'format': '[{asctime}.{msecs:0&lt;3.0f}] {levelname} [{threadName:s}] {module} → {message}',
 'datefmt': &quot;%y/%b/%Y %H:%M:%S&quot;,
 'style': '{',
 },
 }
</code></pre>

By default <code>logging.Formatter('%(asctime)s')</code> prints with the following format:

<pre><code>2011-06-09 10:54:40,638
</code></pre>

where 638 is the millisecond. I need to change the comma to a dot:

<pre><code>2011-06-09 10:54:40.638
</code></pre>

To format the time I can use:

<pre><code>logging.Formatter(fmt='%(asctime)s',datestr=date_format_str)
</code></pre>

however the <a href="http://docs.python.org/library/time.html#time.strftime" rel="noreferrer">documentation</a> doesn't specify how to format milliseconds. I've found <a href="https://stackoverflow.com/questions/698223/how-can-i-parse-a-time-string-containing-milliseconds-in-it-with-python">this SO question</a> which talks about microseconds, but a) I would prefer milliseconds and b) the following doesn't work on Python 2.6 (which I'm working on) due to the <code>%f</code>:

<pre><code>logging.Formatter(fmt='%(asctime)s',datefmt='%Y-%m-%d,%H:%M:%S.%f')
</code></pre>

Python logging: use milliseconds in time format

Python

默认情况下，logging.Formatter('%(asctime)s')以以下格式打印：2011-06-09 10:54:40,638其中638是毫秒。我需要将逗号改为一个点：2011-06-09 10:54:40.638要格式化我可以使用的时间：logging.Formatter(fmt='%(asctime)s...

问Python日志记录:以时间格式使用毫秒
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