Currently, logger messages containing non-ascii characters are displayed as unicode escape sequences, making them illegible to anyone reading the logs.

For example,

from firebase_functions import logger
logger.log("こんにちは")
# outputs: {"severity": "NOTICE", "message": "\u3053\u3093\u306b\u3061\u306f"}

This behavior is due to the logger module making use of json.dumps which by default only outputs ascii characters (see here).

I added ensure_ascii=False to wherever json.dumps was used for the logger messages and now output for these logs should be legible.

logger.log("こんにちは")
# outputs: {"severity": "NOTICE", "message": "こんにちは"}

Let me know if there are any questions or issues 👍