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sentinel object #116

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sentinel object #116

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ac756f9
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PythonFZ Oct 18, 2024
dfcf975
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Oct 18, 2024
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9 changes: 8 additions & 1 deletion znflow/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,13 @@
from znflow.graph import DiGraph


class _NOT_RESVOLED_TYPE:
pass


NOT_RESVOLED = _NOT_RESVOLED_TYPE()


@contextlib.contextmanager
def disable_graph(*args, **kwargs):
"""Temporarily disable set the graph to empty.
Expand Down Expand Up @@ -354,7 +361,7 @@ class FunctionFuture(NodeBaseMixin):
kwargs: typing.Dict
item: any = None

result: any = dataclasses.field(default=None, init=False, repr=True)
result: any = dataclasses.field(default=NOT_RESVOLED, init=False, repr=True)

_protected_ = NodeBaseMixin._protected_ + ["function", "args", "kwargs"]

Expand Down
4 changes: 2 additions & 2 deletions znflow/dynamic.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
import typing as t

from znflow.base import Connection, disable_graph, get_graph, FunctionFuture
from znflow.base import Connection, disable_graph, get_graph, FunctionFuture, NOT_RESVOLED


def resolve(value: t.Union[Connection, t.Any]) -> t.Any:
Expand All @@ -25,7 +25,7 @@ def resolve(value: t.Union[Connection, t.Any]) -> t.Any:
# get the actual value
with disable_graph():
result = value.result
if result is not None:
if result is not NOT_RESVOLED:
return result
# we assume, that if the result is None, the node has not been run yet
graph = get_graph()
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