Override span fields

Force the input, output, name, or other fields on the current span when the auto-captured values aren’t what you want.

By default, Respan captures span input and output from the function arguments and return value. When that isn’t what you want displayed in the trace UI — for example, you want to redact sensitive args, condense a large payload, or surface a different field — override the span at runtime via update_current_span().

Override input & output

Python

1 import json
2 from opentelemetry.semconv_ai import SpanAttributes
3 from respan import Respan
4 from respan.decorators import workflow
5 
6 respan = Respan()
7 client = respan.getClient()
8 
9 @workflow(name="update_attributes_test")
10 def update_attributes_test(input: str):
11     force_set_attributes = {
12         SpanAttributes.TRACELOOP_ENTITY_INPUT: json.dumps({
13             "args": [],
14             "kwargs": {"text": "custom input"}
15         }),
16     }
17 
18     client.update_current_span(
19         attributes=force_set_attributes,
20         name="update_attributes_test",
21         respan_params={"metadata": {"test": "test"}},
22     )
23 
24     return "Some desired output"
25 
26 if __name__ == "__main__":
27     update_attributes_test("Some input")

Use update_current_span(attributes=...) for overriding displayed input/output. Values must be JSON-serializable strings via json.dumps(...).

You can also update spans after they’ve been logged via the Update Span API.

1	import json
2	from opentelemetry.semconv_ai import SpanAttributes
3	from respan import Respan
4	from respan.decorators import workflow
5
6	respan = Respan()
7	client = respan.getClient()
8
9	@workflow(name="update_attributes_test")
10	def update_attributes_test(input: str):
11	force_set_attributes = {
12	SpanAttributes.TRACELOOP_ENTITY_INPUT: json.dumps({
13	"args": [],
14	"kwargs": {"text": "custom input"}
15	}),
16	}
17
18	client.update_current_span(
19	attributes=force_set_attributes,
20	name="update_attributes_test",
21	respan_params={"metadata": {"test": "test"}},
22	)
23
24	return "Some desired output"
25
26	if __name__ == "__main__":
27	update_attributes_test("Some input")