On 404 operation_id is None which causes issues with some tracers

[Alphasite]

The wavefront tracer specifically requires span names be non-None:

ValueError
ValueError: Span name cannot be blank

ValueError
ValueError: Span name cannot be blank

Traceback (most recent call last)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2463, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2449, in wsgi_app
response = self.handle_exception(e)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1866, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2446, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1952, in full_dispatch_request
return self.finalize_request(rv)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1969, in finalize_request
response = self.process_response(response)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2266, in process_response
response = handler(response)
File "/usr/local/lib/python3.7/site-packages/flask_opentracing/tracing.py", line 43, in end_trace
self._after_request_fn(response)
File "/usr/local/lib/python3.7/site-packages/flask_opentracing/tracing.py", line 160, in _after_request_fn
scope.close()
File "/usr/local/lib/python3.7/site-packages/opentracing/scope_managers/__init__.py", line 77, in close
self.span.finish()
File "/usr/local/lib/python3.7/site-packages/wavefront_opentracing_sdk/span.py", line 165, in finish
self._do_finish(time.time() - self.start_time)
File "/usr/local/lib/python3.7/site-packages/wavefront_opentracing_sdk/span.py", line 191, in _do_finish
self.tracer.report_span(self)
File "/usr/local/lib/python3.7/site-packages/wavefront_opentracing_sdk/tracer.py", line 274, in report_span
self._reporter.report(span)
File "/usr/local/lib/python3.7/site-packages/wavefront_opentracing_sdk/reporting/composite.py", line 32, in report
rep.report(wavefront_span)
File "/usr/local/lib/python3.7/site-packages/wavefront_opentracing_sdk/reporting/console.py", line 35, in report
default_source='unknown')
File "/usr/local/lib/python3.7/site-packages/wavefront_sdk/common/utils.py", line 236, in tracing_span_to_line_data
raise ValueError('Span name cannot be blank')
ValueError: Span name cannot be blank

Is there a mechanism to provide a default name for that case?