从 Pyinstaller 运行外部 Python 脚本

Question

I write an application using Pyinstaller which installs Python on the target machine and some packages. At the end of the application I am supposed to spawn a Python script and I use subprocess.Popen() . However, it appears that script cannot execute it as it appears to still use the application's (pyinstaller's) runtime environment. However, running the resulting script stand alone after the installation works.

Is there a way to spawn a process outside the pyinstaller's context?

Answer 1

Just sharing some approaches I made for this problem (at least for my use case).

The first approach would be in the resulting script that is spawned during installation, I explicitly remove the first entry in the PYTHONPATH if it is empty (ie the current directory). This ensures that the necessary Python libraries that are outside the current context (the PyInstaller bootloader) are loaded first. ie

if not sys.path[0]:
    sys.path.pop(0)

For the second approach, there are instances that LD_LIBRARY_PATH environment variable refers to the directory of the extracted installer. Usually occurring in Linux, I would send a modified environment variable set to the subprocess.Popen() where LD_LIBRARY_PATH is removed.

pip_env = os.environ
if 'LD_LIBRARY_PATH' in pip_env:
    pip_env.pop('LD_LIBRARY_PATH')
subprocess.call("<command here>", shell=True, env=pip_env)

Beware of using the above approaches, though. Although it worked on my use case, it may cause unexpected issues for other use cases.