Get the source
You can clone the repository with git by invoking the following commandgit clone https://github.com/IfcOpenShell/IfcOpenShell.git
Alternatively you can download an archive of the source files from:
https://github.com/IfcOpenShell/IfcOpenShell/archive/master.zip
https://github.com/IfcOpenShell/IfcOpenShell/archive/v0.4.0.zip