algorithm/Python
1
0
Fork 0
mirror of https://github.com/TheAlgorithms/Python.git synced 2025-07-08 21:21:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

[mypy] Fix type annotations for strings (#4641)

Browse Source 
* Fix mypy error for min_cost_string_conversion.py

* Fix mypy error for manacher.py

* Fix mypy error for aho_corasick.py
This commit is contained in:
imp
2021-08-25 19:35:36 +08:00
committed by GitHub
parent 78a5d3a558
commit 5e7eed610c
3 changed files with 29 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
strings/aho_corasick.py
View File

@ -3,8 +3,8 @@ from typing import Dict, List, Union
class Automaton:
def __init__(self, keywords: List[str]):
self.adlist = list()
def __init__(self, keywords: list[str]):
self.adlist: list[dict] = list()
self.adlist.append(
{"value": "", "next_states": [], "fail_state": 0, "output": []}
)
@ -22,9 +22,8 @@ class Automaton:
def add_keyword(self, keyword: str) -> None:
current_state = 0
for character in keyword:
if self.find_next_state(current_state, character):
current_state = self.find_next_state(current_state, character)
else:
next_state = self.find_next_state(current_state, character)
if next_state is None:
self.adlist.append(
{
"value": character,
@ -35,10 +34,12 @@ class Automaton:
)
self.adlist[current_state]["next_states"].append(len(self.adlist) - 1)
current_state = len(self.adlist) - 1
else:
current_state = next_state
self.adlist[current_state]["output"].append(keyword)
def set_fail_transitions(self) -> None:
q = deque()
q: deque = deque()
for node in self.adlist[0]["next_states"]:
q.append(node)
self.adlist[node]["fail_state"] = 0
@ -68,7 +69,9 @@ class Automaton:
>>> A.search_in("whatever, err ... , wherever")
{'what': [0], 'hat': [1], 'ver': [5, 25], 'er': [6, 10, 22, 26]}
"""
result = dict() # returns a dict with keywords and list of its occurrences
result: dict = (
dict()
) # returns a dict with keywords and list of its occurrences
current_state = 0
for i in range(len(string)):
while (
@ -76,10 +79,11 @@ class Automaton:
and current_state != 0
):
current_state = self.adlist[current_state]["fail_state"]
current_state = self.find_next_state(current_state, string[i])
if current_state is None:
next_state = self.find_next_state(current_state, string[i])
if next_state is None:
current_state = 0
else:
current_state = next_state
for key in self.adlist[current_state]["output"]:
if not (key in result):
result[key] = []