Library is swallowing log messages from function code #38

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1. Triangulum9r commented on Jul 21, 2021

   

   Triangulum9r

   on Jul 21, 2021

   Last edited by Triangulum9r

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   For whatever reason the lambda runtime interface client doesn't follow standard python logging. It definitely needs top e fixed. There is a logger in aws_lambda_powertools for bootstrapping the loggers and emits json logs as aws CloudWatch logs use structured logging. I assume this should work in cases where you are not using a lambda.

   I ended having to do this to get logging to work for imported modules:

   module being imported

   # mymodule.py
   import inspect
   import logging
   
   from aws_lambda_powertools import Logger
   
   if os.path.basename(sys.modules["__main__"].__file__) == "app.py":
       # use aws lambda logger, formatter
       logger = Logger(child=True)
   else:
       # use default logger
       logger = logging.getLogger(__name__)
       logger.addHandler(NullHandler())
   
   Foo:
       ...

   importing module

   # lambda.py
   from aws_lambda_powertools import Logger
   
   from mymodule import Foo
   
   def handler(event, context):
       Foo()

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