Vinay Sajip added the comment:
This is marked as relevant to Python 3.7, so I ran a test script using the
latest Python sources:
import logging
import logging.config
import sys
def main():
config = {
'version': 1,
'formatters': {
'default': {
'()': 'foo',
},
}
}
logging.config.dictConfig(config)
if __name__ == '__main__':
sys.exit(main())
The exception printouts with/without "raise ... from" are shown in this Gist:
https://gist.github.com/vsajip/a17b51695bbe16bd3c9e156405388e57
I can't see much difference in terms of figuring out where the exception came
from. The only substantial difference is one line "During handling of the above
exception, another exception occurred:" with another "The above exception was
the direct cause of the following exception:".
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<http://bugs.python.org/issue28335>
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