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Add typing to topological_sort.py #9650

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Merged
merged 2 commits into from
Oct 4, 2023
Merged

Add typing to topological_sort.py #9650

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220894e
Add typing
jeremytan-stripe Oct 4, 2023
ed86f1c
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Oct 4, 2023
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12 changes: 9 additions & 3 deletions sorts/topological_sort.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,11 +5,17 @@
# b c
# / \
# d e
edges = {"a": ["c", "b"], "b": ["d", "e"], "c": [], "d": [], "e": []}
vertices = ["a", "b", "c", "d", "e"]
edges: dict[str, list[str]] = {
"a": ["c", "b"],
"b": ["d", "e"],
"c": [],
"d": [],
"e": [],
}
vertices: list[str] = ["a", "b", "c", "d", "e"]


def topological_sort(start, visited, sort):
def topological_sort(start: str, visited: list[str], sort: list[str]) -> list[str]:
"""Perform topological sort on a directed acyclic graph."""
current = start
# add current to visited
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