Log lines seldom print (if at all) from interactive environment created with a call to embed().

Example (broken) code using bpython:

import logging
import bpython

logging.basicConfig()
l = logging.getLogger()
l.critical('before')
bpython.embed(locals())
l.critical('after')

Output from bpython example:

CRITICAL:root:before
>>> l.critical('inside')
>>> 
CRITICAL:root:after

This is in contrast to the behavior from, say, IPython, which prints log lines correctly.

Example (working) code using IPython:

import logging
import IPython

logging.basicConfig()
l = logging.getLogger()
l.critical('before')
IPython.embed(locals=locals())
l.critical('after')

Output from IPython example:

CRITICAL:root:before
...
In [1]: l.critical('inside')
CRITICAL:root:inside

In [2]:
Do you really want to exit ([y]/n)

CRITICAL:root:after