制作rpn项目wheel包时控制台命令报ImportError: cannot import name '__main__'

Let's break down what's going wrong here and how to fix it quickly.

The Root Cause #

Your entry_points configuration is pointing to __main__ in each module, but that's not how console_scripts works. When setting up a console script, setuptools expects a callable function (like your existing main() function) that it can execute directly. __main__ is a special reserved name in Python modules, but it's not a function you can import and run in this context—hence the ImportError you're seeing.

The Fix #

Update your entry_points section in setup.py to point directly to the main() function in each module instead of __main__. Here's the corrected configuration:

entry_points = {
    'console_scripts': [
        'rpn = rpn.rpn:main',
        'makeRPNHelp = rpn.makeHelp:main',
        'makeRPNUnits = rpn.makeUnits:main',
        'prepareRPNPrimeData = rpn.preparePrimeData:main',
        'testRPN = rpn.testRPN:main',
    ],
}

Why This Works #

This change hooks directly into the main() function you already have in each module (the one that runs when if __name__ == '__main__': triggers). Setuptools will generate console scripts (like makeRPNUnits.exe on Windows) that call this function directly, eliminating the need to reference __main__ entirely.

Validation Steps #

1. First, uninstall your current package to clear old artifacts:

   pip uninstall -y rpn
   

2. Rebuild your wheel package:

   python setup.py sdist bdist_wheel
   

3. Install the updated wheel:

   pip install dist/rpn-<your-version-number>.whl
   

4. Test any of your console commands, for example:

   makeRPNUnits.exe
   

This should resolve the ImportError and let your console scripts run as expected.

内容的提问来源于stack exchange，提问作者Rick Gutleber