Navigate the disk cycle, like you can navigate the loop and radial loop cycles in bmesh? So, in bmesh you can navigate the loop cycle via 

loop.link_loop_next
loop.link_loop_prev


You can navigate the radial loop cycle via

loop.link_loop_radial_next
loop.link_loop_radial_prev


What I'm missing is access to the disk cycle. There should IMO be

loop.link_loop_disk_next
loop.link_loop_disk_prev


which would allow you to cycle the loops around a vert, as described here.

Is this something that's coming in the future? Was it left out deliberately? If so, why?

I realize you can do it by combining the loop and radial cycles, but it's not very convenient.

Any input is appreciated!
Something like this?

[edge for edge in vertex.link_edges]


Where vertex is bm.verts[n]. I assume it's in order, otherwise I have to fix my code too if it isn't. 

If you want loops, there's also link_loops.

edit: Here's the current way I'm doing it that actually works ok (radially sorted 1-ring of edges for a vert)

def radial_edges(iv):
    loop = iv.link_loops[0]
    eg = []
    while True:
        eg.append(loop.edge)
        loop = loop.link_loop_radial_next.link_loop_next
        if loop.edge == eg[0]:
            break
    return eg