Unable to pip3 install pythonnet

[amrit-poudel]

Environment

• Pythonnet version: 2.5.2
• Python version: 3.9
• Operating System: macosx 11.6
• .NET Runtime:

Details

• pip3 install pythonnet==2.5.2 crashes with error. I see the 2.5.2 does support python 3.9, was wondering why it crashes on pip3 install.

  TODO

• What commands did you run to trigger this issue? If you can provide a
  Minimal, Complete, and Verifiable example
  this will help us understand the issue.

    print('TODO')

• Collecting pythonnet==2.5.2
  Downloading pythonnet-2.5.2.tar.gz (1.9 MB)
  |████████████████████████████████| 1.9 MB 851 kB/s
  Preparing metadata (setup.py) ... done
  Collecting pycparser
  Downloading pycparser-2.21-py2.py3-none-any.whl (118 kB)
  |████████████████████████████████| 118 kB 148 kB/s
  Building wheels for collected packages: pythonnet
  Building wheel for pythonnet (setup.py) ... error
  ERROR: Command errored out with exit status 1:
  command: /Users/apoudel/Desktop/hpc_lib/homebrew/opt/python@3.9/bin/python3.9 -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/setup.py'"'"'; file='"'"'/private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(file) if os.path.exists(file) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' bdist_wheel -d /private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-wheel-2wbatvmt
  cwd: /private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/
  Complete output (43 lines):
  running bdist_wheel
  running build
  running build_ext
  /bin/sh: mono: command not found
  Traceback (most recent call last):
  File "", line 1, in
  File "/private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/setup.py", line 630, in
  setup(
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/lib/python3.9/site-packages/setuptools/init.py", line 159, in setup
  return distutils.core.setup(**attrs)
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/core.py", line 148, in setup
  dist.run_commands()
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/dist.py", line 966, in run_commands
  self.run_command(cmd)
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/dist.py", line 985, in run_command
  cmd_obj.run()
  File "/private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/setup.py", line 612, in run
  return bdist_wheel.bdist_wheel.run(self)
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/lib/python3.9/site-packages/wheel/bdist_wheel.py", line 299, in run
  self.run_command('build')
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/cmd.py", line 313, in run_command
  self.distribution.run_command(command)
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/dist.py", line 985, in run_command
  cmd_obj.run()
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/command/build.py", line 135, in run
  self.run_command(cmd_name)
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/cmd.py", line 313, in run_command
  self.distribution.run_command(command)
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/dist.py", line 985, in run_command
  cmd_obj.run()
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/command/build_ext.py", line 340, in run
  self.build_extensions()
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/command/build_ext.py", line 449, in build_extensions
  self._build_extensions_serial()
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/distutils/command/build_ext.py", line 474, in _build_extensions_serial
  self.build_extension(ext)
  File "/private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/setup.py", line 249, in build_extension
  self._install_packages()
  File "/private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/setup.py", line 438, in _install_packages
  subprocess.check_call(cmd, shell=use_shell)
  File "/Users/apoudel/Desktop/hpc_lib/homebrew/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 373, in check_call
  raise CalledProcessError(retcode, cmd)
  subprocess.CalledProcessError: Command 'mono tools/nuget/nuget.exe update -self' returned non-zero exit status 127.

---

ERROR: Failed building wheel for pythonnet
Running setup.py clean for pythonnet
Failed to build pythonnet
Installing collected packages: pycparser, pythonnet
DEPRECATION: Configuring installation scheme with distutils config files is deprecated and will no longer work in the near future. If you are using a Homebrew or Linuxbrew Python, please see discussion at Homebrew/homebrew-core#76621
Running setup.py install for pythonnet ... error
ERROR: Command errored out with exit status 1:
command: /Users/apoudel/Desktop/hpc_lib/homebrew/opt/python@3.9/bin/python3.9 -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/setup.py'"'"'; file='"'"'/private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(file) if os.path.exists(file) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' install --record /private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-record-rytd6lqg/install-record.txt --single-version-externally-managed --compile --install-headers /Users/apoudel/Desktop/hpc_lib/homebrew/include/python3.9/pythonnet
cwd: /private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/
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: /Users/apoudel/Desktop/hpc_lib/homebrew/opt/python@3.9/bin/python3.9 -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/setup.py'"'"'; file='"'"'/private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-install-sj3whon9/pythonnet_99c95ae1c8dc44df9dc8586a2f7ee189/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(file) if os.path.exists(file) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' install --record /private/var/folders/95/c_bn57x5613fwcs5n60rckzw0000gp/T/pip-record-rytd6lqg/install-record.txt --single-version-externally-managed --compile --install-headers /Users/apoudel/Desktop/hpc_lib/homebrew/include/python3.9/pythonnet Check the logs for full command output.

    print('TODO')

I would really appreciate if someone could help me resolve this error. Thanks!

[lostmsu]

2.5.2 does not support 3.9. Use 3.x previews.

[amrit-poudel]

@lostmsu, thanks for the note. Are wheels available for 3.x version which supports python v 3.9 (can I use pip3 install pythonnet=3.x)?

[filmor]

Install a prerelease: pip install --pre pythonnet