**Version 2.1.5 is now available for download.**

Pynini is now available on conda-forge. Linux (x86) and MacOS users who already have Conda can install Pynini and all dependencies using the following command: `conda install -c conda-forge pynini`

As of Version 2.1.5, Pynini is now also compiled for MacOS `arm64`

("Apple Silicon") on conda-forge.

Pynini can now be used from a Colab notebook, as shown here. Add the following to the top of your notebook: `! pip install --only-binary :all: pynini`

When using Pynini from a Jupyter or Colab notebook, logging and error messages sent to standard error are lost. To recover them, install `wurlitzer`

and then add the following at the top of your notebook: `%load_ext wurlitzer`

*OpenGrm* *Pynini*, like Thrax, compiles grammars expressed as strings, regular expressions, and context-dependent rewrite rules into weighted finite-state transducers. It uses the OpenFst library and its Python extension to create, access and manipulate compiled grammars. Pynini is embedded in a Python module, allowing users to write Thrax-like grammars using Python's flexible syntax (including imperative programming constructs not available in Thrax) and powerful toolchain.

It is (loosely) named after Pāṇini (पाणिनि), the renowned Sanskrit grammarian.

- Download
- Documentation
- C++ API documentation (for advanced users):

If you use this library in your research, we would appreciate it if you cited one of:

- K. Gorman. 2016. Pynini: A Python library for weighted finite-state grammar compilation. In
*Proceedings of the ACL Workshop on Statistical NLP and Weighted Automata*, pages 75-80. - K. Gorman & R. Sproat. 2021.
*Finite-State Text Processing*. Morgan & Claypool.

Third-party information about the library:

Topic revision: r76 - 2022-04-02 - KyleGorman

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