Installing Iris

You can either install Iris using the conda package manager or from source.

Installing using conda

Iris is available using conda for the following platforms:
  • Linux 64-bit,

  • Mac OSX 64-bit, and

  • Windows 32-bit and 64-bit.

To install Iris using conda, you must first download and install conda, for example from

Once conda is installed, you can install Iris using conda on any platform with the following command:

conda install -c conda-forge iris

If you wish to run any of the code examples (see you will also need the Iris sample data. This can also be installed using conda:

conda install -c conda-forge iris-sample-data

Further documentation on using conda and the features it provides can be found at

Installing from source

The latest Iris source release is available from

Iris makes use of a range of other libraries and python modules. These dependencies must be in place before you can successfully install Iris. Once you have satisfied the requirements detailed in the requirements directory, go to the root of Iris’ and run:

pip install .

In-place build - an alternative for developers

We are very keen to encourage contributions to Iris. For this type of development activity an in-place build can be useful. Once you’ve cloned the Iris git repository you can perform an in-place build with:

pip install -e .

Generating conda requirements

Requirements for Iris are stored in the requirements directory in the root of the source repository. It is possible to generate a requirements file suitable for use with conda:

python requirements/ > conda_requirements.txt

This may then be installed with:

conda create -n my_iris_env --file conda_requirements.txt

Alternatively, a full requirements file that includes all optional dependencies can be produced with:

python requirements/ --groups all > conda_requirements.txt

Running the tests

In order to run the tests, you will need to use the test and docs groups (we include the docs group so that you can run the pull request tests locally). Hence the commands change to:

python requirements/ --groups test docs > conda_requirements.txt
conda create -n my_iris_env -c conda-forge --file conda_requirements.txt
conda activate my_iris_env  # or whatever other name you gave it
pip install -e .

The tests can then be run with

python test

Custom site configuration

The default site configuration values can be overridden by creating the file iris/etc/site.cfg. For example, the following snippet can be used to specify a non-standard location for your dot executable:

dot_path = /usr/bin/dot

An example configuration file is available in iris/etc/site.cfg.template. See iris.config() for further configuration options.