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Documentation

Documentation for the latest version can be found here.

Documentation archives for prior versions can be found here.

Important Notice

While the API is relatively stable, OpenMDAO remains in active development. There will be periodic changes to the API. User's are encouraged to pin their version of OpenMDAO to a recent release and update periodically.

OpenMDAO Versions

OpenMDAO 3.x.y represents the current version and is no longer considered BETA. It requires Python 3.6 or later and is maintained here. To install the latest release, run pip install --upgrade openmdao.

OpenMDAO 2.10.x is the last version to support Python2.x and will only receive critical bug fixes going forward. To install this older release, run pip install "openmdao<3" (the quotes around openmdao<3 are required).

PLEASE NOTE: This repository was previously named OpenMDAO/blue. If you had cloned that repository, please update your repository name and remotes to reflect these changes. You can find instructions here.

The OpenMDAO 1.7.4 code repository is now named OpenMDAO1, and has moved here. To install it, run: pip install "openmdao<2" (the quotes around openmdao<2 are required).

The legacy OpenMDAO v0.x (versions 0.13.0 and older) of the OpenMDAO-Framework are here.

Install OpenMDAO

You have two options for installing OpenMDAO, (1) from the Python Package Index (PyPI), and (2) from the GitHub repository.

OpenMDAO includes several optional sets of dependencies: test for installing the developer tools (e.g., testing, coverage), docs for building the documentation and visualization for some extra visualization tools.
Specifying all will include all of the optional dependencies.

Install from PyPI

This is the easiest way to install OpenMDAO. To install only the runtime dependencies:

pip install openmdao

To install all the optional dependencies:

pip install openmdao[all]

Install from a Cloned Repository

This allows you to install OpenMDAO from a local copy of the source code.

git clone http://github.com/OpenMDAO/OpenMDAO
pip install OpenMDAO

Install for Development

If you would like to make changes to OpenMDAO it is recommended you install it in editable mode (i.e., development mode) by adding the -e flag when calling pip, this way any changes you make to the source code will be included when you import OpenMDAO in Python. You will also want to install the packages necessary for running OpenMDAO's tests and documentation generator. You can install everything needed for development by running:

pip install -e OpenMDAO[all]

Test OpenMDAO

Users are encouraged to run the unit tests to ensure OpenMDAO is performing correctly. In order to do so, you must install the testing dependencies.

  1. Install OpenMDAO and its testing dependencies:

    pip install openmdao[test]

    Alternatively, you can clone the repository, as explained here, and install the development dependencies as described here.

  2. Run tests:

    testflo openmdao -n 1

  3. If everything works correctly, you should see a message stating that there were zero failures. If the tests produce failures, you are encouraged to report them as an issue. If so, please make sure you include your system spec, and include the error message.

    If tests fail, please include your system information, you can obtain that by running the following commands in python and copying the results produced by the last line.

     import platform, sys
    
     info = platform.uname()
     (info.system, info.version), (info.machine, info.processor), sys.version
    

    Which should produce a result similar to:

     (('Windows', '10.0.17134'),
      ('AMD64', 'Intel64 Family 6 Model 94 Stepping 3, GenuineIntel'),
      '3.6.6 | packaged by conda-forge | (default, Jul 26 2018, 11:48:23) ...')
    

Build the Documentation for OpenMDAO

Documentation for the latest version can always be found here, but if you would like to build a local copy you can find instructions to do so here.