Affects Version/s: 0.11.1, 0.13.0
Fix Version/s: 0.15.0
Writing a string categorical variable to from pandas parquet is read back as string (object dtype). I expected it to be read as category.
The same thing happens if the category is numeric – a numeric category is read back as int64.
In the code below, I tried out an in-memory arrow Table, which successfully translates categories back to pandas. However, when I write to a parquet file, it's not.
In the scheme of things, this isn't a big deal, but it's a small surprise.