suffix_trees
Python implementation of Suffix Trees and Generalized Suffix Trees. Also provided methods with typical applications of STrees and GSTrees.
Installation
pip install suffix-trees
Requires Python 3.9+ and has no dependencies.
Usage
from suffix_trees import STree
# Suffix-Tree example.
st = STree.STree("abcdefghab")
print(st.find("abc")) # 0
print(st.find_all("ab")) # {0, 8}
# Generalized Suffix-Tree example.
a = ["xxxabcxxx", "adsaabc", "ytysabcrew", "qqqabcqw", "aaabc"]
st = STree.STree(a)
print(st.lcs()) # "abc"
# lcsm() returns all longest common substrings when there are ties.
a = ["klexxxabc", "kleyyyabc"]
st = STree.STree(a)
print(st.lcsm()) # ["abc", "kle"]
# bytes input works too (find/find_all/lcs/lcsm then accept and return bytes).
st = STree.STree(b"abcdefghab")
print(st.find(b"abc")) # 0
# Online mode (Ukkonen's algorithm): text can be appended incrementally and
# the tree queried between appends.
st = STree.STree(online=True)
st.append("abcab")
print(st.find("bca")) # 1
st.append("xabcd")
print(st.find("abcd")) # 6
Development
The project is managed with uv:
uv sync # create venv and install dev dependencies
uv run pytest # run tests
uv run ruff check # lint
1 maintainer
Release files for suffix-trees 0.4.0
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