v0.2.0

Major changes

N/A

New features

• [ALL] Added SentencePieceNormalizer class in C++/Python. It supports almost the equivalent feature of spm_normalize. Python Sample C++ Sample
• [ALL] Added SentencePieceProcessor::Normalize method in C++/Python Python Sample
  C++ Sample
• [ALL] Added functionality to override the normalization spec before the processing. Python Sample

Bug fixes & minor changes

• Introduce better support of using external abseil and protobuf #869
• Build universal binary in OSX release package #892
• Add the set_min_log_level function to python to change the loglevel from the python wrapper. #893
• Uses the logsumexp techniques in marginal probabilities of n-best tokenization to avoid underflow.
• Support Python 3.12 #932
• Improves the thread utilization in batch encoding/decoding.
• Fix nasty bug in BPE position encoding.
• Fix bugs in the handling of duplicated bigrams

v0.2.0pre1

Major changes

N/A

New features

• [ALL] Added SentencePieceNormalizer class in C++/Python. It supports almost the equivalent feature of spm_normalize. Python Sample C++ Sample
• [ALL] Added SentencePieceProcessor::Normalize method in C++/Python Python Sample
  C++ Sample
• [ALL] Added functionality to override the normalization spec before the processing. Python Sample

Bug fixes & minor changes

• Introduce better support of using external abseil and protobuf #869
• Build universal binary in OSX release package #892
• Add the set_min_log_level function to python to change the loglevel from the python wrapper. #893
• Uses the logsumexp techniques in marginal probabilities of n-best tokenization to avoid underflow.
• Support Python 3.12 #932
• Improves the thread utilization in batch encoding/decoding.
• Fix nasty bug in BPE position encoding.
• Fix bugs in the handling of duplicated bigrams

v0.1.99

Major changes

N/A

New features

N/A

Bug fixes & minor changes

• [ALL] Fixes the NaN issues in unigram model training: #851
• [ALL] Fixes the bug in unigram loss computation: #628
• [ALL] Fixes the minor bug in BPE token extraction algorithm: #318
• [ALL] Increase the number of maximum threads from 128 to 1024. #857

v0.1.99pre1

v0.1.99 pre release for testing.

v0.1.98

Major changes

• Python 3.11 support (wheel packages for python 3.11 are available)
• Includes the entire full sources in the source python package to reduce the pip install troubles.
• Improves the algorithm to initialize unigram seed vocabulary. Coverage is improved.

New features

• [ALL] Added the feature to train the model with pre-tokenization boundary constraints. (--pretokenization_delimiter) flag

Bug fixes & minor changes

• [ALL] Makes the error message more descriptive.
• [ALL] Fixes the crash error when std::random_device failed
• [ALL] Fixes the build error on Raspberry pi around atomic operation
• [ALL] Fixes the minor bugs in nbest enumeration
• [ALL] Fixes the build error when using the external protobuf library.
• [ALL] Fixes the build error on a big-endian machine.
• [Windows] Use /MD build flag instead of /MT.

v0.1.97

Major changes

• Migrated the C++ version from C++11 to C++17.
• Migrated the CI environment from Travis-CI to Github actions
• Started using cibuildtool to build pypi wheel packages

New features

• [ALL] Support differential privacy while training. https://aclanthology.org/2022.findings-acl.171.pdf
• [ALL] Introduced APIs that return the struct of ImmutableSentencePieceText, which encodes string-token, id, and utf-8 byte offsets at once. New API is available both from C++ and Python.
• [ALL] Allow tab ‘\t’ to be included in user defined symbols.
• [ALL] Added NFKD normalization rule. NFKD rule is provided as a TSV file.
• [ALL] Added option to emit unknown symbol instead of raw symbol.
• [Python]: Batch encode/decode requests are performed in native multi-threads.
• [Python]: Supports to pass a custom log stream during training.
• [Python]: Adds module-level version variable: spm.__version__
• [Python]: Creates wheel package of Mac universal binary.

Bug fixes & minor changes

• Uses the efficient encoding algorithm by default. Removed the functionality to switch the Viterbi tokenization algorithm.
• Make the output of Encode and 1-best from NBestEncode same.
• Use std::string_view as much as possible.
• [Python] Removed pip package for ppc64le and s390x architecture as cibuiltool doesn’t support them.

v0.1.96

Updates

• Improves the performance of unigram training
• Updated the nfkc normalization with the latest ICU module.
• Stop handling zero-width-joiner string as whitespace.

New features

• added new sampling algorithm without replacement.
• added API for new sampling and perplexity calculation.
• added allow_whitespace_only_pieces mode.

v0.1.95

Updates

• support to build sentencepiece with the external (official) abseil library.
• upgraded protobuf 3.14.0
• changed the type of input_sentence_size from int32 to uint64.

v0.1.94

Updates

• added SetRandomGeneratorSeed function to set the seed value for random generator. This can allow to make reproducible sampling.
• Validate the range of the vocab id in Python module.
• Change the directory arrangement of python module.
• Added protobuf python module.

Bug fixes

• Support to build python wheel from source package.

v0.1.93

Bug fix

• Fixed the regression bug around the flag --minloglevel
• Fixed minor bugs.

Updates

• Used manylinux2014 to build pypi packages
• Support arm64, ppc64le, s390x architectures in pypi packages
• Support Python 3.9

Removed

• Stopped tf-sentencepiece.
• Stopped the support of Python 2.x and Python 3.4