Pickle is not safe. An alternative implementation may use [PyArrow](https://arrow.apache.org/docs/python/ipc.html#arbitrary-object-serialization) instead: ```python import pyarrow as pa import pandas as pd pa.serialize_to(dict_of_data, r'/path/to/file.a') data = pa.deserialize_from(r'/path/to/file.a', pd.DataFrame) type(data) # dict ```