Comments (7)
Can you share code that reproduces the issue?
from traitlets.
The code below works differently in ipython (terminal) and ipython notebook. In crafting this example, I learned a little more about the problem, which I think I could avoid if I better understood how to make an Application subclass that worked properly (and identically) when instantiated from both an ipython terminal and ipython notebook. With a trivial example like this it seems silly. But with a real Application that is responsible for gluing together several complex Configurable objects it is not so obvious (to me at least). Here is a simple example that demonstrates my original problem:
from traitlets.config import Configurable, Application
from traitlets import Unicode, Int, Float, List
import sys
class MyClass(Configurable):
str = Unicode(u'default string', config=True)
an_int = Int(1, config=True)
def __init__(self, log, **kwargs):
super(MyClass, self).__init__(**kwargs)
self._log = log
def debug(self, msg):
self._log.debug(msg)
def info(self, msg):
self._log.info(msg)
def warn(self, msg):
self._log.warn(msg)
def error(self, msg):
self._log.error(msg)
def test_log(self):
self.debug('dbg')
self.info('info')
self.warn('warn')
self.error('error')
class MyApp(Application):
a_float = Float(1.23, config=True)
classes = List([
MyClass,
])
def __init__(self, **kwargs):
super(MyApp, self).__init__(**kwargs)
def main(argv=None):
cls = MyClass(MyApp.instance().log)
cls.test_log()
def main2(argv=None):
cls = MyClass(MyApp().log)
cls.test_log()
print('calling main2')
main2(['hello'])
print('works with ipython but not notebook')
print('using logger from host application instance')
MyClass(Application.instance().log).test_log()
print('works with ipython but not notebook')
print('using a.test.logger')
import logging
# could also reload and reconfigure, but do not need too
#reload(logging)
#logging.basicConfig(format='%(asctime)s %(levelname)s:%(message)s', level=logging.DEBUG, datefmt='%I:%M:%S')
mylogger = logging.getLogger('a.test.logger')
mylogger.setLevel(logging.INFO)
MyClass(mylogger).test_log()
print('works with both')
#if __name__ == "__main__":
# main2(sys.argv)
from traitlets.
A better example is the one that ships with traitlets in traitlets/examples/myapp.py. Use the following from both an IPython terminal session and an IPython notebook. The terminal session generates log output while the notebook session does not.
import myapp
import sys
sys.argv = [sys.argv[0]]
sys.argv.append('--MyApp.log_level=DEBUG')
myapp.main()
The above code from terminal session generates
[MyApp] Config changed:
[MyApp] {'MyApp': {'log_level': u'DEBUG'}}
app.config:
{'MyApp': {'log_level': u'DEBUG'}}
and from the notebook session generates, where the [MyApp]
log output is missing
app.config:
{'MyApp': {'log_level': u'DEBUG'}}
from traitlets.
I'm not quite sure what's going on with your situation, and I can't imagine it has anything to do with the version of the notebook you're using, but for me, the code you wrote above gives the appropriate output.
from traitlets.
For what it is worth
import IPython
IPython.__version__
outputs '4.0.1'
from traitlets.
I'm running off master, so 4.1.0-dev
. Might be worth trying it out to see if that fixes anything.
from traitlets.
Possibly fixed by #233.
from traitlets.
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from traitlets.