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make _setup_fill_arg serializable #6730

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Merged
merged 2 commits into from
Oct 10, 2022
Merged

make _setup_fill_arg serializable #6730

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9d155b9
make _setup_fill_arg serializable
pmeier Oct 10, 2022
25b1cde
Merge branch 'main' into fill-serialize
pmeier Oct 10, 2022
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10 changes: 8 additions & 2 deletions torchvision/prototype/transforms/_utils.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
import functools
import numbers
from collections import defaultdict

from typing import Any, Callable, Dict, Sequence, Tuple, Type, Union

import PIL.Image
Expand Down Expand Up @@ -43,13 +43,19 @@ def _check_fill_arg(fill: Union[FillType, Dict[Type, FillType]]) -> None:
raise TypeError("Got inappropriate fill arg")


def _default_fill(fill: FillType) -> FillType:
return fill


def _setup_fill_arg(fill: Union[FillType, Dict[Type, FillType]]) -> Dict[Type, FillType]:
_check_fill_arg(fill)

if isinstance(fill, dict):
return fill

return defaultdict(lambda: fill) # type: ignore[return-value, arg-type]
# This weird looking construct only exists, since `lambda`'s cannot be serialized by pickle.
# If it were possible, we could replace this with `defaultdict(lambda: fill)`
return defaultdict(functools.partial(_default_fill, fill))


def _check_padding_arg(padding: Union[int, Sequence[int]]) -> None:
Expand Down