Json Formatter overridden by _get_json_formatter

[djpugh]

• logzero version: 1.7.0
• Python version: 3.7.9
• Operating System: Windows 10

Description

Thanks for the great library!
I was setting up a custom JSON formatter for logging a specific json message (using a custom json default), however this was stymied through

logzero/logzero/__init__.py

Line 139 in bc19173

_formatter = _get_json_formatter(json_ensure_ascii) if json else formatter or LogFormatter()

    _formatter = _get_json_formatter(json_ensure_ascii) if json else formatter or LogFormatter()

Is this intended behaviour (happy to override the formatter in the handler after creating?

Otherwise would suggest checking if isinstance(formatter, JsonFormatter)?

[djpugh]

Happy to contribute the change, want to check if the behaviour is intended first!