Error Handling

[JarredAwesome]

Hey Everyone,

Does anyone have any good ideas for Error Logging?

Obviously, Try-Except will be used. but I am curious how you guys handle the actual logging.

Right now, I have all the logging stored in a file named after the date. then the error is appended to it with the time.

Here is an example:
File Name: Thu-Oct-15-2020.txt

20:15:43: 
CCS811 Sensor Needs to be recalibrated

20:15:59: 
CCS811 Sensor Needs to be recalibrated

20:16:15: 
CCS811 Sensor Needs to be recalibratedp

I am running into two problems:

one: as you can see, if an error occurs, but isn't "program ending", it will inform me of the error every time it happens. which means I end up with the same being logged, multiple times. I'd like a way for the program to look up if its happened before, and simply ignore it if it's already logged. Or at least, just append the time. The only way I can think about doing this is with Mysql, or another DB. Anyone have any ideas?

two: When the error details show up in the terminal, it gives me all the information. Including what function was called when the error occurred, and in what file. When I transfer it to the file, it's just the error. the code format I use is:

Try:
  code to be done
except Exceptions as e:
  appendtotextfilefunction(e)

I am assuming there is methods within e that need to be called to do it?

[bowlofred]

Are you using the logging module? Calling logging.exception("message") from within the except block should generate the traceback information in the log for you.

[JarredAwesome]

Are you using the logging module? Calling logging.exception("message") from within the except block should generate the traceback information in the log for you.

I'm new to Python. I didn't know about the logging module. is it standard, or do I have to install it?

[JarredAwesome]

So I looked up the logging module. It looks help full, but is there an advantage of using this over Try-Except"?

Also, can this be set to ignore multiples of the same error?

[metulburr]

one: as you can see, if an error occurs, but isn't "program ending", it will inform me of the error every time it happens. which means I end up with the same being logged, multiple times. I'd like a way for the program to look up if its happened before, and simply ignore it if it's already logged. Or at least, just append the time. The only way I can think about doing this is with Mysql, or another DB. Anyone have any ideas?

two: When the error details show up in the terminal, it gives me all the information. Including what function was called when the error occurred, and in what file. When I transfer it to the file, it's just the error.

1)

if ERRORSTRING not in ERRORFILE:
	my_log_function(ERRORSTRING)

2) IF you are referring to the traceback you can get the traceback and add it to the error log.
https://pymotw.com/3/traceback/index.html

But again the logging module exists to not have to reinvent the wheel like you are trying to do

[JarredAwesome]

one: as you can see, if an error occurs, but isn't "program ending", it will inform me of the error every time it happens. which means I end up with the same being logged, multiple times. I'd like a way for the program to look up if its happened before, and simply ignore it if it's already logged. Or at least, just append the time. The only way I can think about doing this is with Mysql, or another DB. Anyone have any ideas?

two: When the error details show up in the terminal, it gives me all the information. Including what function was called when the error occurred, and in what file. When I transfer it to the file, it's just the error.

1)

if ERRORSTRING not in ERRORFILE:
	my_log_function(ERRORSTRING)

2) IF you are referring to the traceback you can get the traceback and add it to the error log.
https://pymotw.com/3/traceback/index.html

But again the logging module exists to not have to reinvent the wheel like you are trying to do

Defiantly don't want to reinvent the wheel. I am just trying to understand the tools available.

As I continue to look into Logging, it appears they are meant to be used in tandom