[PyErr_SetString]

"I think its simple. Unless the person is interested in Mono they don't develop for it and don't have any interest in supporting it."

But why wouldn't someone who IS interested in running the application on Linux simply do the last bits to get it to other platforms? I have NEVER seen that happen.

"And while there are thousand of useful C# programs I doubt many don't have direct python / Linux competitors readily available that do near enough the same thing."

Sure, but I refuse to believe all the competitors are always doing a better job. There should be at least some application that found their way over to for example Linux.