bleak install fail in python 3.9.4

[lynn1234]

PS D:\Bluetooth\source\bleak_ble> pip install bleak
Requirement already satisfied: bleak in c:\users\27798\appdata\local\programs\python\python39\lib\site-packages\bleak-0.11.0-py3.9.egg (0.11.0)
Collecting pythonnet
  Using cached pythonnet-2.5.2.tar.gz (1.9 MB)
Requirement already satisfied: pycparser in c:\users\27798\appdata\local\programs\python\python39\lib\site-packages (from pythonnet->bleak) (2.20)
Using legacy 'setup.py install' for pythonnet, since package 'wheel' is not installed.
Installing collected packages: pythonnet
    Running setup.py install for pythonnet ... error
    ERROR: Command errored out with exit status 1:
     command: 'c:\users\27798\appdata\local\programs\python\python39\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\27798\\AppData\\Local\\Temp\\pip-install-_v8w_4r6\\pythonnet_d425e98099d642a29a0944d966a271fc\\setup.py'"'"'; __file__='"'"'C:\\Users\\27798\\AppData\\Local\\Temp\\pip-install-_v8w_4r6\\pythonnet_d425e98099d642a29a0944d966a271fc\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\27798\AppData\Local\Temp\pip-record-344zqvdc\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\27798\appdata\local\programs\python\python39\Include\pythonnet'
         cwd: C:\Users\27798\AppData\Local\Temp\pip-install-_v8w_4r6\pythonnet_d425e98099d642a29a0944d966a271fc\
    Complete output (6 lines):
    usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
       or: setup.py --help [cmd1 cmd2 ...]
       or: setup.py --help-commands
       or: setup.py cmd --help

    error: option --single-version-externally-managed not recognized
    ----------------------------------------
ERROR: Command errored out with exit status 1: 'c:\users\27798\appdata\local\programs\python\python39\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\27798\\AppData\\Local\\Temp\\pip-install-_v8w_4r6\\pythonnet_d425e98099d642a29a0944d966a271fc\\setup.py'"'"'; __file__='"'"'C:\\Users\\27798\\AppData\\Local\\Temp\\pip-install-_v8w_4r6\\pythonnet_d425e98099d642a29a0944d966a271fc\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\27798\AppData\Local\Temp\pip-record-344zqvdc\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\27798\appdata\local\programs\python\python39\Include\pythonnet' Check the logs for full command output.

[hbldh]

The Bleak version available on PyPI does not support Python 3.9 in Windows. You might install version 0.12.0b1 from the develop branch to get a preview of that:

> pip install --force-reinstall https://github.com/hbldh/bleak/archive/develop.zip#egg=bleak