import onnx
from onnx.external_data_helper import ExternalDataInfo, _get_initializer_tensors
from pathlib import Path
from collections import Counter

model_path = Path("./model.onnx")

# _get_model_external_data_paths 
onnx_model = onnx.load(str(model_path), load_external_data=False)
model_tensors = _get_initializer_tensors(onnx_model)
# filter out tensors that are not external data
model_tensors_ext = [
    ExternalDataInfo(tensor).location
    for tensor in model_tensors
    if tensor.HasField("data_location") and tensor.data_location == onnx.TensorProto.EXTERNAL
]
data = [model_path.parent / tensor_name for tensor_name in model_tensors_ext]

data_count = Counter(data)
print(data_count)