wikipedia_sentences.csv download code missing or DATA_DIR should be hardcoded

[watate]

Got this error:

FileNotFoundError: [Errno 2] No such file or directory: '/workspace/ml-act/data_dir/wikipedia_sentences.csv'                                                                              
                                                                                                                                                                                          
Set the environment variable HYDRA_FULL_ERROR=1 for a complete stack trace.               

The README seems to imply that you can set DATA_DIR to any directory but doing so leads to the error above ^.

This is because download_external_data.py doesn't have code to download wikipedia_sentences.csv.

wikipedia_sentences.csv is found in /ml-act/tests/data

I think maybe either (1) the DATA_DIR should be hardcoded to /ml-act/tests/data, or (2) code should be added to download_external_data.py to download wikipedia_sentences.csv

Happy to make PR if you can point me to where you got wikipedia_sentences.csv!

https://github.com/apple/ml-act/blob/d2c3560b7022da795d58f892c398ab77cff13590/act/scripts/download_external_data.py#L64C1-L86C60

[watate]

I just realized the datasets are not the same? Setting "export DATA_DIR="/workspace/ml-act/tests/data" causes pytest . -m "not slow" to fail a test case.