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loggingipythonjupyter-notebook
bjonen
bjonen

Reputation: 1563

Avoid red background color for logging output in Ipython Notebook

Is it possible to avoid the red background color when the notebook prints logging output? For an example see this sample notebook.

http://nbviewer.ipython.org/gist/bjonen/1bd52a7d8a4761a74074

Upvotes: 22

Views: 8064

Answers (4)

Alex
Alex

Reputation: 3431

The highlighted answer did not work for me. Jupyter Notebook seems to set up the logger before any imports are done. To redirect any stderr to stdout, I had to first reload the logging module:

import sys
import logging
from importlib import reload
reload(logging)

logging.basicConfig(stream=sys.stdout, format='',
                level=logging.INFO, datefmt=None)
log = logging.getLogger(__name__)
log.info("This should print as normal output in Jupyter, and not in a red box")

This can also be included in a package being imported to Jupyter Notebook, e.g. with import my_dev_package - and prevent log.Info being shown as red box. To only run this in Jupyter Mode (not console) for the package, add a check: if not type(sys.stdout) == io.TextIOWrapper: # Jupyter Mode.

Upvotes: 7

dataista
dataista

Reputation: 3457

This snippet worked for me. I hated the red background and wanted it to have another color. Here I change the background color to green, but you can set the CSS to whatever you want:

from IPython.core.display import HTML
HTML("""
<style>
div.output_stderr {
    background: #0C0;
}
</style>
""")

Upvotes: 1

akuhn
akuhn

Reputation: 27803

That is because logging is logged to stderr

If you install the Stylus browser plugin you can change the CSS style to use a different color.

.jp-RenderedText[data-mime-type='application/vnd.jupyter.stderr'] {
    background: var(--jp-cell-editor-background);
}

Is this helpful?

Upvotes: 0

Thomas K
Thomas K

Reputation: 40370

The red background highlights output sent to stderr as opposed to stdout. To avoid it, you could send your logging to stdout:

ch = logging.StreamHandler(sys.stdout)

Upvotes: 18

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