Merge pull request #1092 from dat-boris/patch-prompt

fix(dspy): fix langchain predict (#1091)

dspy/teleprompt/bootstrap.py

@@ -112,10 +112,17 @@ def _prepare_predictor_mappings(self):
 
  for (name1, predictor1), (name2, predictor2) in zip(student.named_predictors(), teacher.named_predictors()):
  assert name1 == name2, "Student and teacher must have the same program structure."
- assert predictor1.signature.equals(
- predictor2.signature,
- ), (f"Student and teacher must have the same signatures. "
- f"{type(predictor1.signature)} != {type(predictor2.signature)}"
+ if hasattr(predictor1.signature, "equals"):
+ assert predictor1.signature.equals(
+ predictor2.signature,
+ ), (f"Student and teacher must have the same signatures. "
+ f"{type(predictor1.signature)} != {type(predictor2.signature)}"
+ )
+ else:
+ # fallback in case if .equals is not implemented (e.g. dsp.Prompt)
+ assert predictor1.signature == predictor2.signature, (
+ f"Student and teacher must have the same signatures. "
+ f"{type(predictor1.signature)} != {type(predictor2.signature)}"
  )
  assert id(predictor1) != id(predictor2), "Student and teacher must be different objects."