While reading json from files, using polars give exception when it has empty json. But it is not the same in pandas. I have some files with only key and not value.

Is polars still primitive and not matured like pandas? which package to use?

Polars

from io import StringIO
import polars as pl

print(pl.read_json(StringIO('{"key":{}}')))

gives exception

pyo3_runtime.PanicException: called `Result::unwrap()` on an `Err` value: ComputeError(ErrString("a StructArray must contain at least one field"))

Pandas

from io import StringIO
import pandas as pd

print(pd.read_json(StringIO('{"key":{}}')))

works without exception, gives output as

Empty DataFrame
Columns: [key]
Index: []