[FEATURE]: add option to skip first function variable (self) for input in LLMObs decorators

[yann-combarnous]

Package Name

ddtrace

Package Version(s)

3.16.0

Describe the goal of the feature

Currently LLMObs decorator also include the current instance of object when applied to class functions.

This is not useful for LLMObs, and in Traces preview, only the first argument of function is shown, so would be nice to be able to skip, either by option of auto-detection.

Reproduce

from ddtrace.llmobs.decorators import tool
...
class ABC
...
   @tool(name="my_span")
   def my_function(self, a, b):
      ...

Actual

{
   "input": {
      "self": "<ABC object at 0x7fd6fe122120>",
      "a": ...
   }   
}

Expected

{
   "input": {
      "a": ...
   }   
}

Is your feature request related to a problem?

No response

Describe alternatives you've considered

No response

Additional context

No response