select fields in scan does not works

[djouallah]

Apache Iceberg version

0.6.0 (latest release)

Please describe the bug 🐞

running this

table.scan(selected_fields=('file'),).to_pandas() i get this error

KeyError: 'f'

The above exception was the direct cause of the following exception:

ValueError                                Traceback (most recent call last)
[/usr/local/lib/python3.10/dist-packages/pyiceberg/schema.py](https://localhost:8080/#) in select(self, case_sensitive, *names)
    308                 ids = {self._lazy_name_to_id_lower[name.lower()] for name in names}
    309         except KeyError as e:
--> 310             raise ValueError(f"Could not find column: {e}") from e
    311 
    312         return prune_columns(self, ids)

ValueError: Could not find column: 'f'

the field exist for sure, i tried with other columns , same error

[kevinjqliu]

KeyError: 'f'

Feels like it's treating the string as a list of characters. I think selected_fields should be a tuple of strings.

table.scan(selected_fields=('file',),).to_pandas()

Notice the , after 'file', which turns it into a tuple

[kevinjqliu]

>>> type(('file'))
<class 'str'>
>>> type(('file',))
<class 'tuple'>

Because python :)

[djouallah]

Thanks !!! sorry for the noise