Installation#

The easiest way to install OpenGHG is using pip, first ensure you have a recent version of Python installed.

Checking your Python installation#

OpenGHG is developed and tested on Linux and MacOS, support for Windows is planned.

To install OpenGHG, you first need to install Python >= 3.9. To check if you have Python 3.9 installed type;

python -V

This should print out the version number of the Python you have available. If the version number is 2.x then you must use the python3 command, if this this is the case, try;

python3 -V

and see if you have a Python 3 that has a version number >= 3.9. If so, please use python3 instead of python.

If you don’t have Python >= 3.9 installed, then you can install Python either via your package manager if using Linux or Homebrew on MacOS. An alternative for both platforms is anaconda.

Installation#

We highly recommend creating a separate virtual environment for openghg. This ensures the correct versions of libraries can be installed without making changes to versions of libraries needed for other projects / programs.

pip#

First create a virtual environment and activate it

python -m venv /path/to/env/openghg_env
source /path/to/env/bin/activate

Here change /path/to/env with your own path.

Next install OpenGHG

pip install openghg

conda#

First create and activate a conda environment

conda create --name openghg_env
conda activate openghg_env

Next install OpenGHG from our conda channel

conda install --channel conda-forge --channel openghg openghg

Configuration#

OpenGHG needs to know where to create the object store it uses to store data, it does this by reading a configuration file in your home directory. As part of the setup process we need to create this configuration file using either the openghg.util.create_config function or the command line interface.

Python#

You can use the create_config function to help you make a config file. First import

In [1]: from openghg.util import create_config

In [2]: create_config()

OpenGHG configuration
---------------------

Enter path for object store (default /home/gareth/openghg_store):
INFO:openghg.util:Creating config at /home/gareth/.config/openghg/openghg.conf

INFO:openghg.util:Configuration written to /home/gareth/.config/openghg/openghg.conf

Here I left the path to the object store blank to use the default path in my home directory.

Command line#

You can also use the openghg command line tool to get the configuration file setup.

openghg --quickstart

OpenGHG configuration
---------------------

Enter path for object store (default /home/gareth/openghg_store):
INFO:openghg.util:Creating config at /home/gareth/.config/openghg/openghg.conf

INFO:openghg.util:Configuration written to /home/gareth/.config/openghg/openghg.conf

A configuration file has been created and you’re ready to run OpenGHG. If you ever want to modify the configuration file you can find it at ~/.config/openghg/openghg.conf. My configuration file looks like this

user_id = "47363762-2963-4a2d-8afc-dejh05380f19"

[object_store]
local_store = "/home/gareth/openghg_store"

Deprecation of OPENGHG_PATH#

If you’ve previously used OpenGHG and worked through our tutorials you might have encountered the need to set the OPENGHG_PATH environment variable. Now that we’ve moved to a configuration file this is not longer used. If you previously set a custom path using the variable please update the configuration file as below.

Developers#

For developers please see the Getting setup documentation.

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