gensim

jieba

The most popular Chinese text segmentation library.

spacy

A library for industrial-strength natural language processing in Python and Cython.

nltk

A leading platform for building Python programs to work with human language data.

OpenCCC++ core

Traditional/Simplified Chinese conversion with regional variants and phrase-level rules.

stanza

The Stanford NLP Group's official Python library, supporting 60+ languages.

pypinyin

Convert Chinese hanzi (漢字) to pinyin (拼音).

pangu.py

Paranoid text spacing.