Das deutsche Python-Forum

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from PyQt5 import QtGui, QtCore, QtWidgets

self.app_path = QtCore.QDir.homePath()

dir_source = QtWidgets.QFileDialog.getExistingDirectory(
            self, "Quell-Ordner", self.app_path)

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apt install python3-pyqt5

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python3 -m pipenv install pyqt5

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import sys
from pathlib import Path

from PyQt5 import QtWidgets


class MainWindow(QtWidgets.QWidget):
    def __init__(self, native=False):
        super().__init__()

        self.button = QtWidgets.QPushButton("Verzeichnis auswählen")
        self.button.clicked.connect(self.choose_directory)

        self.close_button = QtWidgets.QPushButton("Beenden")
        self.close_button.clicked.connect(QtWidgets.QApplication.quit)

        layout = QtWidgets.QVBoxLayout(self)
        layout.addWidget(self.button)
        layout.addWidget(self.close_button)

        # name mangling
        self.__native = native

    def choose_directory(self):
        # alternativ QtCore.QDir.homePath()
        # ein Path objekt kann man nicht direkt verwenden
        # falls doch -> crash
        downloads = str(Path.home().joinpath("Downloads"))
        options = QtWidgets.QFileDialog.Options()

        if self.__native:
            options |= QtWidgets.QFileDialog.DontUseNativeDialog
        else:
            options &= ~QtWidgets.QFileDialog.DontUseNativeDialog

        folder = QtWidgets.QFileDialog.getExistingDirectory(
            self, "Wähle ein Verzeichnis", downloads, options=options
        )

        if folder:
            QtWidgets.QMessageBox.information(self, "Auswahl", f"Gewählt: {folder}")


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    window = MainWindow(native=True)
    window.show()
    sys.exit(app.exec_())

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class DaisyCopy(QtWidgets.QMainWindow, daisy_creator_mag_ui.Ui_DaisyMain):
    """
    mainClass
    The second parent must be 'Ui_<obj. name of main widget class>'.
    """

    process_validator_error_signal = QtCore.pyqtSignal(str)
    process_validator_output_signal = QtCore.pyqtSignal(str)

    def __init__(self, parent=None):
        """Settings"""
        super(DaisyCopy, self).__init__(parent)
        

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def __init__(self, parent=None, native=False):