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Add typing to topological_sort.py (#9650)

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* Add typing

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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---------

Co-authored-by: Jeremy Tan <jeremytan@stripe.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
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Tan Kai Qun, Jeremy 2023-10-04 10:47:03 +09:00 committed by GitHub
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commit 12431389e3
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1 changed files with 9 additions and 3 deletions
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sorts/topological_sort.py
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@ -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