擅长:python、mysql、java
<p>默认值似乎是<code>%(levelname)s:%(name)s:%(message)s</code></p>
<pre><code>import logging
logging.error("Some error")
print "fmt: " , logging.root.handlers[0].formatter._fmt
# ERROR:root:Some error
# fmt: %(levelname)s:%(name)s:%(message)s
</code></pre>