[PyQt] QFile "Unknown error" when opening file from resource

[Elvis Stansvik]

Hi all,

I'm trying to load a file from a Qt resource (.qrc).

These are the files contained in the .qrc:

(guipy2)estan at newton:~/orexplore/dev/orexplore.gui$ find resources
resources
resources/rock_types
resources/rock_types/all.txt
resources/rock_types/igneous.txt
resources/rock_types/sedimentary.txt
resources/rock_types/metamorphic.txt
resources/rock_types.qrc

As can be seen by looking at it:

(guipy2)estan at newton:~/orexplore/dev/orexplore.gui$ cat resources/rock_types.qrc
<RCC>
    <qresource prefix="/">
        <file>rock_types/all.txt</file>
        <file>rock_types/igneous.txt</file>
        <file>rock_types/metamorphic.txt</file>
        <file>rock_types/sedimentary.txt</file>
    </qresource>
</RCC>

He's how I generate rock_types_rc.py from it:

(guipy2)estan at newton:~/orexplore/dev/orexplore.gui$ pyrcc5
resources/rock_types.qrc -o orexplore/gui/resources/rock_types_rc.py
(guipy2)estan at newton:~/orexplore/dev/orexplore.gui$

And this is how I import and try to use one of the embedded files:

(guipy2)estan at newton:~/orexplore/dev/orexplore.gui$ cat
orexplore/gui/corelog/view/rock_type.py
from PyQt5.QtCore import QFile, QIODevice
from PyQt5.QtWidgets import QStyledItemDelegate, QLineEdit, QCompleter

from orexplore.gui.resources import rock_types_rc


class RockTypeDelegate(QStyledItemDelegate):

    def __init__(self, parent=None):
        super(RockTypeDelegate, self).__init__(parent)

        rockTypes = []
        rockTypesFile = QFile(':/rock_types/all.txt')
        rockTypesFile.open(QIODevice.ReadOnly)

        print(rockTypesFile.errorString())

        while not rockTypesFile.atEnd():
            rockTypes.append(str(rockTypesFile.readLine()))

        self._completer = QCompleter(rockTypes)

    def createEditor(self, parent, option, index):
        edit = QLineEdit(parent)
        edit.setCompleter(self._completer)

        return edit

Note how I'm printing the QFile errorString() right after opening the
file. The result when running the app is:

(guipy2)estan at newton:~/orexplore/dev/orexplore.gui$ python -m orexplore.gui.main
Unknown error

Anyone know what I'm doing wrong here?

Cheers,
Elvis