Process Error when using julia in python

在 WSL2 下的 Ubuntu 20.04 中使用 Julia 1.4.1 和 Python 3.8.10 重现导入失败。先从 julia/install.jl、julia/core.py 和 julia/juliainfo.py 开始，然后查阅 PyJulia 的故障排除页面中关于已报告的 libpython 警告的内容。完成标准是确定 Julia 子进程以非零值退出的原因，并记录经过验证的解决方案。

Hello together,
I want to use the DifferentialEquations julia module in python via PyJulia.
So I tried to get julia and PyJulia running.
I have installed Julia versions 1.4.1 and Python version 3.8.10.
But when I try to use any julia module, for example with the following code:

import julia
julia.install()
from julia import Base

I always get the following log-output with error message:

[ Info: Julia version info
Julia Version 1.4.1
Platform Info:
  OS: Linux (x86_64-linux-gnu)
      Ubuntu 20.04.3 LTS
  uname: Linux 5.10.16.3-microsoft-standard-WSL2 #1 SMP Fri Apr 2 22:23:49 UTC 2021 x86_64 x86_64
  CPU: Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz: 
              speed         user         nice          sys         idle          irq
       #1  2304 MHz      11102 s        109 s       2904 s    1807437 s          0 s
       #2  2304 MHz      10488 s         21 s       2898 s    1698775 s          0 s
       #3  2304 MHz      12425 s         77 s       3045 s    1806027 s          0 s
       #4  2304 MHz       7958 s        137 s       2933 s    1701791 s          0 s
       #5  2304 MHz       7714 s         93 s       2768 s    1701425 s          0 s
       #6  2304 MHz       4788 s         99 s       2038 s    1815790 s          0 s
       #7  2304 MHz      10981 s         65 s       3585 s    1697422 s          0 s
       #8  2304 MHz       5493 s         25 s       2182 s    1815091 s          0 s
       
  Memory: 7.670402526855469 GB (4687.16015625 MB free)
  Uptime: 19332.0 sec
  Load Avg:  0.15283203125  0.2890625  0.91845703125
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, skylake)
Environment:
  HOME = /home/vinc777
  TERM = xterm-color
  PATH = /bin:/home/vinc777/.vscode-server/bin/dfd34e8260c270da74b5c2d86d61aee4b6d56977/bin/remote-cli:/home/vinc777/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/wsl/lib:/mnt/c/Program Files/copasi.org/COPASI 4.34.251/bin:/mnt/c/WINDOWS/system32:/mnt/c/WINDOWS:/mnt/c/WINDOWS/System32/Wbem:/mnt/c/WINDOWS/System32/WindowsPowerShell/v1.0/:/mnt/c/WINDOWS/System32/OpenSSH/:/mnt/c/Program Files/MATLAB/R2020b/bin:/mnt/c/Program Files/Git/cmd:/mnt/c/Program Files/TortoiseSVN/bin:/mnt/c/Users/User/AppData/Local/Microsoft/WindowsApps:/mnt/c/Users/User/AppData/Local/Programs/MiKTeX/miktex/bin/x64/:/mnt/c/Users/User/AppData/Local/GitHubDesktop/bin:/mnt/c/Users/User/AppData/Local/Programs/Microsoft VS Code/bin:/snap/bin
[ Info: Julia executable: /usr/bin/julia
[ Info: Trying to import PyCall...
┌ Warning: PyCall is already installed.  However, you may have trouble using
│ this Python executable because it is statically linked to libpython.
│ 
│ For more information, see:
│     [https://pyjulia.readthedocs.io/en/latest/troubleshooting.html]()
│ 
│ Python executable:
│     /bin/python3
│ Julia executable:
│     /usr/bin/julia
└ @ Main ~/.local/lib/python3.8/site-packages/julia/install.jl:90
---------------------------------------------------------------------------
CalledProcessError                        Traceback (most recent call last)
/home/vinc777/masterthesis/two_variant_model/pyjulia/pyjulia.ipynb Cell [1](vscode-notebook-cell://wsl%2Bubuntu/home/vinc777/masterthesis/two_variant_model/pyjulia/pyjulia.ipynb#ch0000000vscode-remote?line=0)' in <module>
      1[ import julia
      ]()[2](vscode-notebook-cell://wsl%2Bubuntu/home/vinc777/masterthesis/two_variant_model/pyjulia/pyjulia.ipynb#ch0000000vscode-remote?line=1)[ julia.install()
----> ]()[3](vscode-notebook-cell://wsl%2Bubuntu/home/vinc777/masterthesis/two_variant_model/pyjulia/pyjulia.ipynb#ch0000000vscode-remote?line=2)[ from julia import Base

File <frozen importlib._bootstrap>:991, in _find_and_load(name, import_)

File <frozen importlib._bootstrap>:975, in _find_and_load_unlocked(name, import_)

File <frozen importlib._bootstrap>:655, in _load_unlocked(spec)

File <frozen importlib._bootstrap>:618, in _load_backward_compatible(spec)

File ~/.local/lib/python3.8/site-packages/julia/core.py:248, in JuliaModuleLoader.load_module(self, fullname)
    ]()[245](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=244)[ if juliapath == 'Main':
    ]()[246](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=245)[     return sys.modules.setdefault(fullname,
    ]()[247](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=246)[                                   JuliaMainModule(self, fullname))
--> ]()[248](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=247)[ elif self.julia.isafunction(juliapath):
    ]()[249](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=248)[     return self.julia.eval(juliapath)
    ]()[251](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=250)[ try:

File ~/.local/lib/python3.8/site-packages/julia/core.py:239, in JuliaModuleLoader.julia(self)
    ]()[237](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=236)[ @property
    ]()[238](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=237)[ def julia(self):
--> ]()[239](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=238)[     self.__class__.julia = julia = Julia()
    ]()[240](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=239)[     return julia

File ~/.local/lib/python3.8/site-packages/julia/core.py:468, in Julia.__init__(self, init_julia, jl_init_path, runtime, jl_runtime_path, debug, **julia_options)
    ]()[466](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=465)[     self.api = get_libjulia()
    ]()[467](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=466)[ elif init_julia:
--> ]()[468](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=467)[     jlinfo = JuliaInfo.load(runtime)
    ]()[469](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=468)[     if jlinfo.version_info < (0, 7):
    ]()[470](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=469)[         raise RuntimeError("PyJulia does not support Julia < 0.7 anymore")

File ~/.local/lib/python3.8/site-packages/julia/juliainfo.py:87, in JuliaInfo.load(cls, julia, **popen_kwargs)
     ]()[83](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=82)[         raise subprocess.CalledProcessError(
     ]()[84](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=83)[             retcode, [julia, "-e", "..."], output
     ]()[85](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=84)[         )
     ]()[86](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=85)[     else:
---> ]()[87](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=86)[         raise subprocess.CalledProcessError(
     ]()[88](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=87)[             retcode, [julia, "-e", "..."], stdout, stderr
     ]()[89](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=88)[         )
     ]()[91](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=90)[ stderr = stderr.strip()
     ]()[92](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=91)[ if stderr:

CalledProcessError: Command '['julia', '-e', '...']' returned non-zero exit status 1.]()

I already tried reinstalling julia and PyCall and some suggested workarounds for similar problems but it nothing helped.

Maybe someone knows what the problem is.

Thanks
Vincent