I don't think you can write a DLL/dylib in D to work with Python, since D has a GC (actually, it looks like maybe use of the GC can be worked around with some careful programming in D. Still, the D runtime itself may conflict.) From the article:

> In that case, your requirements to the language are pretty harsh: it must not have an invasive runtime, must not have a GC, and must support the C ABI. Right now, the only languages I think that fit this are C, C++, and Rust.