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Using the psycopg2-binary package means that the apropriate compiled binary for the user platform will be shipped alongside the python binaries. Otherwise the python bindings and the C shims would be shipped which would then require the postgres development packages as well. This just makes things easier, since we don't require the build dependencies.
pyln-testing: A library to write tests against c-lightning
This library implements a number of utilities that help building tests for c-lightning nodes. In particular it provides a number of pytest fixtures that allow the management of a test network of a given topology and then execute a test scenarion.
pyln-testing is used by c-lightning for its internal tests, and by the
community plugin directory to exercise the plugins.
Installation
pyln-testing is available on pip:
pip install pyln-testing
Alternatively you can also install the development version to get access to currently unreleased features by checking out the c-lightning source code and installing into your python3 environment:
git clone https://github.com/ElementsProject/lightning.git
cd lightning/contrib/pyln-testing
python3 setup.py develop
This will add links to the library into your environment so changing the checked out source code will also result in the environment picking up these changes. Notice however that unreleased versions may change API without warning, so test thoroughly with the released version.