No handlers could be found for logger "brother_ql.devicedependent"

[jwindleGitHub]

Got a new Raspberry Pi Zero, loaded the latest OS, loaded brother_ql_web and get this message:
No handlers could be found for logger "brother_ql.devicedependent"
Traceback (most recent call last):
File "./brother_ql_web.py", line 28, in
except FileNotFoundError as e:
NameError: name 'FileNotFoundError' is not defined

Any suggestions?

[larsfroelich]

having the same issue

[jwindleGitHub]

I think that I found that although python3 was installed on my machine it needed to be linked to the python2 executable file in /usr/bin/python

[FriedrichFroebel]

There are two issues here: The logger error message from the issue title only occurs with Python < 3.2 (see https://docs.python.org/3/howto/logging.html#what-happens-if-no-configuration-is-provided).

For the FileNotFoundError part, the offending block is

brother_ql_web/brother_ql_web.py

Lines 25 to 30 in 9e20b6d

	try:
	with open('config.json', encoding='utf-8') as fh:
	CONFIG = json.load(fh)
	except FileNotFoundError as e:
	with open('config.example.json', encoding='utf-8') as fh:
	CONFIG = json.load(fh)

FileNotFoundError has not been defined in Python 2, while /usr/bin/python usually pointed to Python 2 in the past (at least until Ubuntu 20.04 if I am not mistaken). Running python3 brother_ql_web.py should have worked. As soon as the configuration file is available, the undefined FileNotFoundError exception class will not be an issue any more on Python 2 as well, due to the way Python handles such exceptions.