在另一台机器上运行可执行文件时，PyInstaller 错误加载 Python DLL

Question

I'm trying to run a pyinstaller-built executable on another machine. The error I see is Error loading Python DLL 'C:\Users\User\AppData\Local\Temp\_MEI70722\python39.dll

I built the program like this, I also added -F to make sure the executable is standalone:

py -m PyInstaller script.py -F

I tried adding --add-binary and --add-data options with the path to python39.dll , but that didn't help.

The program is built on Windows 10 x64 , the machine I'm trying to run the program on is Windows 7 x64 . Even with such a difference and the fact that Python 3.9 is not for Windows 7, I really doubt this is the reason, otherwise I would expect another error.

What am I doing wrong?

Answer 1

Ok so here's solution that worked for me:

1. Install a Windows7-compatible version of python3. I did this from the Windows Store, which made it accessible in my command line as "python3."

2. Set up a virtual environment with your downgraded version of python. On command line, that's

   ...> python3 -m venv my_env

3. In command line, navigate to your newly created environment directory, and use pip to re-install pyinstaller in your new environment:

   ...> cd my_env

   ...\my_env> pip install pyinstaller

4. From command line in my_env, use pyinstaller to compile your code. You should probably move script.py into your my_env directory.

   ...\my_env> pyinstaller script.py -F

I was able to copy the standalone script created in \my_env onto a Windows 7 machine and run it successfully. Hope this helps!