Fixed PathLike being defined everywhere

predtuner/_dbloader.py

 import logging
 from pathlib import Path
-from typing import List, Tuple, Union
+from typing import List, Tuple
 
 from opentuner import resultsdb
 from opentuner.resultsdb.models import Configuration, Result, TuningRun
 from sqlalchemy.orm.session import Session
 from sqlalchemy.sql.expression import func
 
+from ._logging import PathLike
 
 msg_logger = logging.getLogger(__name__)
-PathLike = Union[Path, str]
 
 
 def read_opentuner_db(filepath_or_uri: PathLike) -> List[Tuple[Result, Configuration]]:

predtuner/approxapp.py

 import abc
 import logging
 from pathlib import Path
-from typing import Dict, Generic, List, Optional, Tuple, Type, TypeVar, Union
+from typing import Dict, Generic, List, Optional, Tuple, Type, TypeVar
 
 import matplotlib.pyplot as plt
 import numpy as np
 from opentuner.measurement.interface import MeasurementInterface
 from opentuner.search.manipulator import ConfigurationManipulator, EnumParameter
 
-from ._logging import override_opentuner_config
+from ._logging import PathLike, override_opentuner_config
 from ._pareto import is_pareto_efficient
 
 msg_logger = logging.getLogger(__name__)
 KnobsT = Dict[str, str]
-PathLike = Union[Path, str]
 TunerConfigT = Dict[int, int]
 
 

predtuner/approxes/approxes.py

 """Approximation techniques for torch.nn layers."""
 from pathlib import Path
-from typing import Dict, Iterable, Set, Type, Union
+from typing import Dict, Iterable, Set, Type
 
 import torch
 from torch.nn import Conv2d, Linear, Module, Parameter
 
+from .._logging import PathLike
 from ..torchapp import BaselineKnob, TorchApproxKnob
 from ._copy import module_only_deepcopy
 
-PathLike = Union[Path, str]
-
 
 def _interpolate_first_dim(tensor: torch.Tensor, interp_indices: Iterable[int]):
     def tensor_at(idx_: int):

predtuner/modeledapp.py

@@ -9,10 +9,10 @@ import numpy as np
 import pandas as pd
 import torch
 
-from .approxapp import ApproxApp, ApproxKnob, ApproxTuner, Config, KnobsT
+from .approxapp import ApproxApp, ApproxTuner, Config, KnobsT
+from ._logging import PathLike
 
 msg_logger = logging.getLogger(__name__)
-PathLike = Union[Path, str]
 
 
 class ModeledApp(ApproxApp, abc.ABC):