[Feature] Make Teleprompt.compile methods more type checker friendly.

[TyTodd]

What feature would you like to see?

In the following code, the type checker won't recognize the member weather_function on compiled_agent because it was returned from MIPROv2.compile.

class MyAgent(Module):
    def __init__(self):
        super().__init__()
        self.predict = dspy.ReAct("question -> answer", tools=[self.weather_function])

    def weather_function(self):
        return random.random()

optimizer = MIPROv2(metric=dspy.evaluate.answer_exact_match, auto="light")
compiled_agent = optimizer.compile(student=MyAgent(), trainset=trainset, teacher=teacher, valset=valset)
print(compiled_agent.weather_function())

This can be a small nuisance for certain workflows where you want to extend the functionality of a dspy.Module with certain functions and attributes. And it can be easily fixed using TypeVars.

Just made the PR #9013 to solve this but realized I should have added an issue first. Also wanted to gauge how important this is to others given its such a small change.

Would you like to contribute?

• Yes, I'd like to help implement this.
• No, I just want to request it.

Additional Context

No response

[TomeHirata]

Thanks, commented on the pr.