Logger printing the logs twice to console

import logging
from sacred import Experiment
from sacred.settings import SETTINGS
SETTINGS.CAPTURE_MODE = 'no'
ex = Experiment('test')

logger = logging.getLogger('test')
ch = logging.StreamHandler()
ch.setLevel(logging.INFO)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
ch.setFormatter(formatter)
logger.addHandler(ch)

@ex.automain
def main():
	logger.info("hahah")

output:

2018-04-12 04:32:24,363 - test - WARNING - No observers have been added to this run
WARNING - test - No observers have been added to this run
2018-04-12 04:32:24,363 - test - INFO - Running command 'main'
INFO - test - Running command 'main'
2018-04-12 04:32:24,364 - test - INFO - Started
INFO - test - Started
2018-04-12 04:32:24,364 - test - INFO - hahah
INFO - test - hahah
2018-04-12 04:32:24,364 - test - INFO - Completed after 0:00:00
INFO - test - Completed after 0:00:00

Why is everything getting printed twice? One with date and one without? Since my log can be huge, I don’t want to send them to observers.

[eastskykang]

I found the solution for my case, (tensorflow 1.8.0)

from tensorflow.python.platform import tf_logging as logging
logging._get_logger().propagate = False

simply works.

[bzamecnik]

It seems that the only problem is that sacred.utils.create_basic_stream_logger() has a hard coded format. The proper solution would be to make the format parametrizable (and provide this as default). In my case copying the function and providing different format worked well (even with other modules and tensorflow. Custom format, no log duplication.

def create_basic_stream_logger(format):
    logger = logging.getLogger('')
    logger.setLevel(logging.INFO)
    logger.handlers = []
    ch = logging.StreamHandler()
    formatter = logging.Formatter(format)
    ch.setFormatter(formatter)
    logger.addHandler(ch)
    return logger

ex = Experiment('foo')
# custom format with date
ex.logger = create_basic_stream_logger('%(asctime)s - %(name)s - %(levelname)s - %(message)s')