[FIXED] Python package: Stylesheet not loaded when launching script

Issue

I have a package with the following structure:

package
├── LICENSE
├── README.md
├── MANIFEST.in
├── my_pkg
│   └── __init__.py
│   └── main.py
│   └── style.qss
├── setup.py

When I install it from github using pip, the stylesheet file style.qss is cloned, but when I launch the script typing foopkg it is not loaded. This is my setup.py file:

setup.py

import setuptools

with open("README.md", "r") as fh:
    long_description = fh.read()

setuptools.setup(
    name="my_pkg",
    version="0.0.1",
    author="foo",
    author_email="[email protected]",
    description="A small gui",
    long_description=long_description,
    long_description_content_type="text/markdown",
    # url="https://github.com/foo/pkg",
    include_package_data=True,
    packages=setuptools.find_packages(),
    install_requires=[
        'PyQt5',
    ],
    classifiers=[
        "Programming Language :: Python :: 3",
        "License :: OSI Approved :: MIT License",
        "Operating System :: OS Independent",
    ],
    python_requires='>=3.7',
    entry_points={
        "gui_scripts": [
            "foopkg = my_pkg.main:main",
        ]
    }
)

And this is my MANIFEST.in file:

MANIFEST.in

recursive-include my_pkg *.qss

The main.py is

main.py

import sys
    ...
def main():
    app = QApplication(sys.argv)
    style_path = sys.path[0] + '/style.qss'

    file = QFile(style_path)
    file.open(QFile.ReadOnly)
    stream = QTextStream(file.readAll())
    app.setStyleSheet(stream.readAll())

    gui = GuiWindow()
    gui.show()

    app.exec_()


if __name__ == '__main__':
    main()

What am I missing? What should I modify to be able to call my script using stylesheet?

Solution

When you build routes you must take into account what information each part contains, for example sys.path[0] contains the information from where the application is launched, for example when launching the entrypoint in Linux in my case it is /usr/bin. Instead you should use the __file__ attribute:

import os


CURRENT_DIR = os.path.dirname(os.path.realpath(__file__))

def main():
    app = QApplication(sys.argv)
    style_path = os.path.join(CURRENT_DIR, 'style.qss')

    file = QFile(style_path)
    # ...

Answered By - eyllanesc