Python: cannot set socket option SO_REUSEPORT

I cannot set SO_REUSEPORT to 1 on a socket in Python. I am aware that SO_REUSEPORT does not exist on Windows, however many Python libraries make use of it.

>>> import socket
>>> s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
>>> s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 22] Invalid argument

It fails in both Python 2.7 and 3.4 on Windows Build 14393.447

sudo apt-get install python2.7 python3.4
python2.7 -c 'import socket; s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM); s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)'
python3.4 -c 'import socket; s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM); s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)'

Related answers on StackOverflow:

• 'SO_REUSEPORT' is not defined on Windows 7
• Socket options SO_REUSEADDR and SO_REUSEPORT, how do they differ? Do they mean the same across all major operating systems?

both

>>> s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
>>> s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

work fine.

The report names no source file or test. Start by reproducing the Python socket commands in the stated Windows and WSL environments, then compare the SO_REUSEPORT behavior with SO_REUSEADDR. Done means establishing whether WSL should support this option and identifying a corresponding code or documentation change.