opentelemetry-api: StatusCode is not public/exported by default

[vmihailenco]

Should StatusCode be exported by default? E.g. I would like to do the following

from opentelemetry import trace

with tracer.start_as_current_span("main") as span:
    span.set_status(trace.Status(trace.StatusCode.ERROR, "error description"))

But trace.StatusCode is not available and should be imported separately

from opentelemetry.trace.status import StatusCode

Is it intentional?

[owais]

If Status is exported directly from the trace module, I don't see any reason to not export StatusCode as well. Most of the time people would want to use Status is to set a status on a span so they'd also need StatusCode.

We should either remove Status from trace module and have users import both Status and StatusCode from opentelemetry.trace.status or make both available from the trace module. Don't have a strong preference.

[lzchen]

@owais
My vote is for simply adding StatusCode into trace module.