bug(memtable): can't load polars Enum

[gforsyth]

Discussed in #9983

^{Originally posted by bzm3r August 31, 2024}
I am using "ibis-framework[duckdb,polars]=9.3.0". I create a polars dataframe:

import polars as pl

xs = ["a", "b", "c"]
xs = pl.Series("x", xs, dtype=pl.Enum(xs))
df = pl.DataFrame(xs)
print(df)

Which produces:

shape: (3, 1)
┌──────┐
│ x    │
│ ---  │
│ enum │
╞══════╡
│ a    │
│ b    │
│ c    │
└──────┘

Then, I load this using Ibis:

import ibis

ibis.options.interactive = True
t = ibis.memtable(df, name="t")
print(t)

Which produces:

File ~/.venv/lib/python3.12/site-packages/ibis/expr/api.py:557, in _memtable_from_polars_dataframe(data, name, schema, columns)
    553     assert schema is None, "if `columns` is not `None` then `schema` must be `None`"
    554     schema = sch.Schema(dict(zip(columns, sch.infer(data).values())))
...
     75     )
     76 else:
---> 77     return _from_polars_types[base_type](nullable=nullable)

KeyError: Enum