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Merge pull request #1416 from minrk/traitlets-log

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avoid error if another traitlets Application is initialized
This commit is contained in:
Carol Willing
2017-09-14 10:50:52 -07:00
committed by GitHub
parent 3b07bd286b 2beeaa0932
commit 7deea6083a
1 changed files with 8 additions and 1 deletions
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9
jupyterhub/alembic/env.py
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@@ -12,9 +12,16 @@ config = context.config
# Interpret the config file for Python logging. # Interpret the config file for Python logging.
# This line sets up loggers basically. # This line sets up loggers basically.
if 'jupyterhub' in sys.modules: if 'jupyterhub' in sys.modules:
from traitlets.config import MultipleInstanceError
from jupyterhub.app import JupyterHub from jupyterhub.app import JupyterHub
app = None
if JupyterHub.initialized(): if JupyterHub.initialized():
app = JupyterHub.instance() try:
app = JupyterHub.instance()
except MultipleInstanceError:
# could have been another Application
pass
if app is not None:
alembic_logger = logging.getLogger('alembic') alembic_logger = logging.getLogger('alembic')
alembic_logger.propagate = True alembic_logger.propagate = True
alembic_logger.parent = app.log alembic_logger.parent = app.log