checkpoint str has no attribute 'get'

I was following the llama2 7b guide, consenus not enough ram and other issues.
tried the stories110M guide, worked all the way till I went to test it.
I may remember lm_eval not being installed (its what my terminal said) not sure if that could be causing anything
I am trying to eval model accuracy, and that is where this error is stemming from.

file I am using to save the .pte

import torch

with open("llama2_coreml_all.pte", 'wb') as file:
	torch.save('f',"llama2_coreml_all.pte", _use_new_zipfile_serialization=True)

script and terminal info

❯ python -m examples.models.llama2.eval_llama -c llama2_coreml_all.pte -p params.json -t tokenizer.model -d fp32 --max_seq_len 512 --limit 100
Could not import fairseq2 modules.
2024-04-30:23:20:24,518 INFO     [builder.py:80] Loading model with checkpoint=llama2_coreml_all.pte, params=params.json, use_kv_cache=False, weight_type=WeightType.LLAMA
Traceback (most recent call last):
  File "/opt/anaconda3/envs/executorch/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/opt/anaconda3/envs/executorch/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/Users/anthonymikinka/executorch/examples/models/llama2/eval_llama.py", line 29, in <module>
    main()  # pragma: no cover
  File "/Users/anthonymikinka/executorch/examples/models/llama2/eval_llama.py", line 25, in main
    eval_llama(modelname, args)
  File "/Users/anthonymikinka/executorch/examples/models/llama2/eval_llama_lib.py", line 261, in eval_llama
    eval_wrapper = gen_eval_wrapper(model_name, args)
  File "/Users/anthonymikinka/executorch/examples/models/llama2/eval_llama_lib.py", line 209, in gen_eval_wrapper
    manager: LlamaEdgeManager = _prepare_for_llama_export(model_name, args)
  File "/Users/anthonymikinka/executorch/examples/models/llama2/export_llama_lib.py", line 629, in _prepare_for_llama_export
    load_llama_model(
  File "/Users/anthonymikinka/executorch/examples/models/llama2/builder.py", line 83, in load_llama_model
    model, example_inputs, _ = EagerModelFactory.create_model(
  File "/Users/anthonymikinka/executorch/examples/models/model_factory.py", line 44, in create_model
    model = model_class(**kwargs)
  File "/Users/anthonymikinka/executorch/examples/models/llama2/model.py", line 84, in __init__
    if (not fairseq2_checkpoint) and checkpoint.get(
AttributeError: 'str' object has no attribute 'get'

cc @kimishpatel @YifanShenSZ @cymbalrush