Question/problem with dataset labels
thanks for the tip. very strange :/ I'll check my datasets version as well. 

I will have more similar experiments soon so I'll let you know if I manage to get rid of this. 
Hi, I'm using a dataset with two labels "nurse" and "not nurse". For whatever reason (that I don't understand), I get an error that I think comes from the datasets package (using csv). Everything works fine if the labels are "nurse" and "surgeon". 

This is the trace I get:

```
File "../../../models/tr-4.3.2/run_puppets.py", line 523, in <module>
    main()
  File "../../../models/tr-4.3.2/run_puppets.py", line 249, in main
    datasets = load_dataset("csv", data_files=data_files)
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/datasets/load.py", line 740, in load_dataset
    builder_instance.download_and_prepare(
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/datasets/builder.py", line 572, in download_and_prepare
    self._download_and_prepare(
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/datasets/builder.py", line 650, in _download_and_prepare
    self._prepare_split(split_generator, **prepare_split_kwargs)
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/datasets/builder.py", line 1028, in _prepare_split
    writer.write_table(table)
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/datasets/arrow_writer.py", line 292, in write_table
    pa_table = pa_table.cast(self._schema)
  File "pyarrow/table.pxi", line 1311, in pyarrow.lib.Table.cast
  File "pyarrow/table.pxi", line 265, in pyarrow.lib.ChunkedArray.cast
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/pyarrow/compute.py", line 87, in cast
    return call_function("cast", [arr], options)
  File "pyarrow/_compute.pyx", line 298, in pyarrow._compute.call_function
  File "pyarrow/_compute.pyx", line 192, in pyarrow._compute.Function.call
  File "pyarrow/error.pxi", line 122, in pyarrow.lib.pyarrow_internal_check_status
  File "pyarrow/error.pxi", line 84, in pyarrow.lib.check_status
pyarrow.lib.ArrowInvalid: Failed to parse string: not nurse
```

Any ideas how to fix this? For now, I'll probably make them numeric. 
Question/problem with dataset labels 
 Hi, I'm using a dataset with two labels "nurse" and "not nurse". For whatever reason (that I don't understand), I get an error that I think comes from the datasets package (using csv). Everything works fine if the labels are "nurse" and "surgeon". 

This is the trace I get:

```
File "../../../models/tr-4.3.2/run_puppets.py", line 523, in <module>
    main()
  File "../../../models/tr-4.3.2/run_puppets.py", line 249, in main
    datasets = load_dataset("csv", data_files=data_files)
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/datasets/load.py", line 740, in load_dataset
    builder_instance.download_and_prepare(
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/datasets/builder.py", line 572, in download_and_prepare
    self._download_and_prepare(
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/datasets/builder.py", line 650, in _download_and_prepare
    self._prepare_split(split_generator, **prepare_split_kwargs)
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/datasets/builder.py", line 1028, in _prepare_split
    writer.write_table(table)
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/datasets/arrow_writer.py", line 292, in write_table
    pa_table = pa_table.cast(self._schema)
  File "pyarrow/table.pxi", line 1311, in pyarrow.lib.Table.cast
  File "pyarrow/table.pxi", line 265, in pyarrow.lib.ChunkedArray.cast
  File "/dccstor/redrug_ier/envs/last-tr/lib/python3.8/site-packages/pyarrow/compute.py", line 87, in cast
    return call_function("cast", [arr], options)
  File "pyarrow/_compute.pyx", line 298, in pyarrow._compute.call_function
  File "pyarrow/_compute.pyx", line 192, in pyarrow._compute.Function.call
  File "pyarrow/error.pxi", line 122, in pyarrow.lib.pyarrow_internal_check_status
  File "pyarrow/error.pxi", line 84, in pyarrow.lib.check_status
pyarrow.lib.ArrowInvalid: Failed to parse string: not nurse
```

Any ideas how to fix this? For now, I'll probably make them numeric.  
 thanks for the tip. very strange :/ I'll check my datasets version as well. 

I will have more similar experiments soon so I'll let you know if I manage to get rid of this. 