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Add a docstring for EventTreeDataType

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This commit is contained in:
Dave Pearson
2023-03-01 14:10:45 +00:00
parent b73cd781be
commit abdcf2fea8
1 changed files with 5 additions and 0 deletions
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src/textual/widgets/_tree.py
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@@ -32,6 +32,11 @@ TreeDataType = TypeVar("TreeDataType")
"""The type of the data for a given instance of a [Tree][textual.widgets.Tree]."""
EventTreeDataType = TypeVar("EventTreeDataType")
"""The type of the data for a given instance of a [Tree][textual.widgets.Tree].
Similar to [TreeDataType][textual.widgets._tree.TreeDataType] but used for
``Tree`` messages.
"""
LineCacheKey: TypeAlias = "tuple[int | tuple, ...]"