source: geniuswebcore/geniusweb/simplerunner/gui/MyFileChooser.py@ 100

from PyQt5.QtWidgets import QWidgetAction, QTextEdit, QPushButton, QGridLayout, \
        QFileDialog, QWidget, QLineEdit


class MyFileChooser (QWidget):
        '''
        one-line panel with on left the chosen file and on the right a "Browse"
        button. If you click browse button you can browse for a file. You can also
        just type the file location.
        '''

        def __init__(self):
                super().__init__()
                self.filenamearea = QLineEdit()
                self.filenamearea.setText("select a file")
                self.browsebutton = QPushButton()
                self.browsebutton.setText("Browse")

                layout = QGridLayout()
                self.setLayout(layout)

                layout.addWidget(self.filenamearea, 0, 0)
                layout.addWidget(self.browsebutton, 0, 1)
                self.browsebutton.clicked.connect(self.browseclick)

        def browseclick(self):
                                fc = QFileDialog()
                                if fc.exec_() > 0:  # ? what does this function return?
                                        self.filenamearea.setText(fc.selectedFiles()[0])

        def getFile(self) -> str:
                return self.filenamearea.text();