Catch error when loading Celery config

Question

I'm trying to catch an ImportError from Celery's config_from_object because I want the configuration to be loaded from a default module when it's not available. I tried

app = Celery('foo', include=['foo.tasks'])
try:
    app.config_from_object('foo_config')
except ImportError:
    app.config_from_object('foo.defaultconfig')

but this doesn't load the default configuration. What's going on here?

Answer 1

Found it: Celery 3.1 apparently loads the configuration lazily. The (undocumented) force argument to config_from_object can apparently be used to suppress lazy loading.