This sort of error is usually caused by conflicting requirements between different python packages. Something may want a specific version of six which is less than the version wanted by cliff. To find what package that is, you need to study the log of what was installed and watch for messages about uninstalling six to install a different version.
This sort of error is usually caused by conflicting requirements between different python packages. Something may want a specific version of six which is less than the version wanted by cliff. To find what package that is, you need to study the log of what was installed and watch for messages about uninstalling six to install a different version.