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Overview

PyOptiSLang is a Python wrapper for Ansys optiSLang. It supports Pythonic access to Ansys optiSLang to be able to communicate with Ansys optiSLang directly from Python. The latest ansys-optislang package provides these capabilities:

  • Start and manage local instances of Ansys optiSLang

  • Remote connections to Ansys optiSLang instances via TCP/IP

  • Create new Ansys optiSLang projects

  • Open existing Ansys optiSLang projects

  • Control Ansys optiSLang project execution

  • Save Ansys optiSLang projects

  • Execute Ansys optiSLang Python API scripts on backend side

  • Evaluate designs on root project level

  • Create and connect nodes

Documentation and issues

For comprehensive information on PyOptiSLang, see the latest release documentation. On the PyOptiSLang Issues page, you can create issues to submit questions, report bugs, and request new features. This is the best place to post questions and code.

Installation

The ansys-optislang-core package supports Python 3.12 through 3.14 on Windows and Linux. Three modes of installation are available:

  • User installation

  • Developer installation

  • Offline installation

For either a developer or offline installation, consider using a virtual environment.

User installation

Install the latest release from PyPi with this command:

pip install ansys-optislang-core

Alternatively, install the latest PyOptiSLang GitHub package with this command:

pip install git+https://github.com/ansys/pyoptislang.git

Developer installation

If you plan on doing local development with GitHub, clone and install PyOptiSLang with this code:

git clone https://github.com/ansys/pyoptislang.git
cd pyoptislang
pip install -e .

A developer installation allows you to edit ansys-optislang-core files locally. Any changes that you make are reflected in your setup after restarting the Python kernel.

Offline installation

Using a wheelhouse can be helpful if you work for a company that restricts access to external networks. From the Releases page in the PyOptiSLang repository, you can find the wheelhouses for a particular release in its assets and download the wheelhouse corresponding to your setup.

You can then install PyOptiSLang and all of its dependencies from one single entry point that can be shared internally, which eases the security review of the PyOptiSLang package content.

For example, on Linux with Python 3.12, unzip the wheelhouse and install PyOptiSLang with code like this:

unzip PyOptiSLang-v0.1.0-wheelhouse-Linux-3.12.zip wheelhouse
pip install ansys-optislang-core -f wheelhouse --no-index --upgrade --ignore-installed

If you’re on Windows with Python 3.12, unzip the wheelhouse to a wheelhouse directory and then install using the same pip command as in the preceding Linux code example.

Dependencies

You must have a local licensed copy or a remote instance of optiSLang installed. The first supported version is 2023 R1.

Getting started

Using the Optislang class, you can either launch optiSLang locally or connect to an already running optiSLang instance. By default, PyOptiSLang uses local domain communication (Named Pipes on Windows and Unix Domain Sockets on Linux) in user scope. For remote connections, TCP/IP communication can be used optionally.

Launch optiSLang locally

For launching optiSLang locally, use the Optislang class without specifying either of the local_server_id or host and port arguments. This launches optiSLang locally and establishes a local domain communication channel. The communication_channel argument can be specified to use remote TCP/IP communication if desired. Other parameters can optionally be specified.

from ansys.optislang.core import Optislang

osl = Optislang()
osl.dispose()

Connect to an already running optiSLang instance

For connection to an already running optiSLang instance, you must specify either of the local_server_id or host and port arguments. Arguments related to the execution of a new optiSLang instance are ignored in this case.

from ansys.optislang.core import Optislang

host = "127.0.0.1"
port = 5310
osl = Optislang(host=host, port=port)
osl.dispose()

Basic usage

This code shows how to launch optiSLang locally, open and run a Python script file, save the results to a new project, and then close the connection:

from ansys.optislang.core import Optislang

osl = Optislang()
file_path = r"C:\Users\Username\my_scripts\myscript.py"
osl.application.project.run_python_file(path=file_path)
osl.application.save_copy("MyNewProject.opf")
osl.dispose()

License and acknowledgments

PyOptiSLang is licensed under the MIT license.

PyOptiSLang makes no commercial claim over Ansys whatsoever. This library extends the functionality of Ansys optiSLang by adding a Python interface to optiSLang without changing the core behavior or license of the original software. The use of the interactive control of PyOptiSLang requires a legally licensed local copy of optiSLang.

For more information on optiSLang, see the Ansys optiSLang page on the Ansys website.

Project links

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Credits

Author/Maintainer: ANSYS, Inc.

GitHub Statistics

Data verified by PyPI on Sep 14, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

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MIT
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Python <4, >=3.12

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