pyyaml AttributeError: cython_sources
The Issue The problem was first reported on the PyYAML GitHub repository, under the issue titled AttributeError: ‘CythonSources’ with Cython 3.0.0a10. Users reported that when trying to install PyYAML from sources with Cython 3.0.0a10, the installation failed and threw an AttributeError: ‘CythonSources’.
This issue was widely discussed, and several solutions were proposed by the community. In this blog post, we will go over these proposed solutions to help you navigate this compatibility issue.