Function InferArrowType

python/pyarrow/src/arrow/python/inference.cc:793–810

Non-exhaustive type inference

// Non-exhaustive type inference
Result<std::shared_ptr<DataType>> InferArrowType(PyObject* obj, PyObject* mask,
                                                 bool pandas_null_sentinels) {
  if (pandas_null_sentinels) {
    // ARROW-842: If pandas is not installed then null checks will be less
    // comprehensive, but that is okay.
    internal::InitPandasStaticData();
  }

  std::shared_ptr<DataType> out_type;
  TypeInferrer inferrer(pandas_null_sentinels);
  RETURN_NOT_OK(inferrer.VisitSequence(obj, mask));
  RETURN_NOT_OK(inferrer.GetType(&out_type));
  if (out_type == nullptr) {
    return Status::TypeError("Unable to determine data type");
  } else {
    return std::move(out_type);
  }
}

ARROW_PYTHON_EXPORT
bool IsPyBool(PyObject* obj) { return internal::PyBoolScalar_Check(obj); }