Custom datatype for pathlib.Path

[jmittelstaedt]

Hi,
I was wondering if it was possible to make a custom data type for pathlib.Path's. I tried looking at the documentation but the only real examples I could find were extending current data types. I'd tried the code snippet below but I get the error TypeError: Cannot interpret 'DataType(PathlibPath)' as a data type. I was wondering if such a thing is possible, and if so what I would need to make this work?

import pandas as pd
import pandera as pa
from pandera import dtypes
from pandera.engines import pandas_engine

@pandas_engine.Engine.register_dtype
class PathlibPath(pa.dtypes.DataType):
    def check(self, pandera_dtype: pa.dtypes.DataType):
        return isinstance(pandera_dtype, pahtlib.PurePath)
    
    def coerce(self, series: pd.Series) -> pd.Series:
        return series.map(lambda x: pathlib.Path(x))
    
    def __str__(self):
        return "PathlibPath"
    
    def __hash__(self):
        return hash("1")

[N-Demir]

Curious as well if a solution could apply to any user defined types? I store other objects in my columns than the base pandas types.