Is there a way to make loguru automatically print the trace_id in logs like logging does?

[commonfurture]

I can print out the trace_id using the default logging, but I can't do it with loguru. Is there a way to make loguru also print out the trace_id?

[Rocksus]

What I ended up doing was making a custom wrapper for my loguru logger, which automatically binds the traceID and spanID for me

tracing_log_format = (
    "<green>{time:YYYY-MM-DD HH:mm:ss}</green> | "
    "<level>{level: <8}</level> | "
    "<yellow>req_id:{extra[request_id]}</yellow> | "
    "<red>t:{extra[otelTraceID]} s:{extra[otelSpanID]}</red> | "
    "<cyan>{name}</cyan>:<cyan>{function}</cyan>:<cyan>{line}</cyan> - <level>{message}</level>"
    "<blue>context: {extra}</blue>"
)

logger.configure(
    extra={"otelSpanID": 0, "otelTraceID": 0}
)

logger.add(sys.stderr, format=tracing_log_format, level="INFO")

def _prepare_logger_extras() -> Dict[str, Any]:
    extra_data = {}
    span = trace.get_current_span()
    extra_data["otelSpanID"] = trace.format_span_id(
        span.get_span_context().span_id
    )
    extra_data["otelTraceID"] = trace.format_trace_id(
        span.get_span_context().trace_id
    )

    return extra_data

def info(__message: str, *args: Any, **kwargs: Any):
    logger.opt(depth=1).bind(**_prepare_logger_extras()).info(
        __message, *args, **kwargs
    )

Though I'm not sure if this can be considered good practice or not, maybe others can also help enlighten me on this

[lzchen]

Only the standard Python logging library is currently supported by OpenTelemetry. Converting this to a feature request to support loguru.

[lzchen]

Related: https://github.com/open-telemetry/opentelemetry-python/issues/3806

[phitoduck]

If anyone more knowledgable on Otel can comment, the creator of loguru is trying to implement this, but is held back by knowing if the behavior is close enough to what the opentelemetry-python-logging module does: https://github.com/Delgan/loguru/issues/674#issuecomment-1874389387