How to use the photini.pyqt.QtWidgets.QMessageBox function in Photini

def upload_error(self, name, error):
        dialog = QtWidgets.QMessageBox(self)
        dialog.setWindowTitle(translate(
            'UploaderTabsAll', 'Photini: upload error'))
        dialog.setText(translate(
            'UploaderTabsAll', '<h3>File "{}" upload failed.</h3>').format(
                name))
        dialog.setInformativeText(error)
        dialog.setIcon(QtWidgets.QMessageBox.Warning)
        dialog.setStandardButtons(QtWidgets.QMessageBox.Abort |
                                  QtWidgets.QMessageBox.Retry)
        dialog.setDefaultButton(QtWidgets.QMessageBox.Retry)
        self.abort_upload.emit(dialog.exec_() == QtWidgets.QMessageBox.Retry)

' accept and Photini cannot convert.')
            buttons = QtWidgets.QMessageBox.Ignore
        elif (self.image_types['rejected'] == '*' or
              image.file_type in self.image_types['rejected']):
            msg = translate(
                'UploaderTabsAll',
                'File "{0}" is of type "{1}", which {2} does not' +
                ' accept. Would you like to convert it to JPEG?')
            buttons = QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.Ignore
        else:
            msg = translate(
                'UploaderTabsAll',
                'File "{0}" is of type "{1}", which {2} may not' +
                ' handle correctly. Would you like to convert it to JPEG?')
            buttons = QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No
        dialog = QtWidgets.QMessageBox(parent=self)
        dialog.setWindowTitle(
            translate('UploaderTabsAll', 'Photini: incompatible type'))
        dialog.setText(
            translate('UploaderTabsAll', '<h3>Incompatible image type.</h3>'))
        dialog.setInformativeText(msg.format(os.path.basename(image.path),
                                             image.file_type, self.service_name))
        dialog.setIcon(QtWidgets.QMessageBox.Warning)
        dialog.setStandardButtons(buttons)
        dialog.setDefaultButton(QtWidgets.QMessageBox.Yes)
        result = dialog.exec_()
        if result == QtWidgets.QMessageBox.Ignore:
            return 'omit'
        if result == QtWidgets.QMessageBox.Yes:
            return self.convert_to_jpeg
        return None

min(spec.min_fl_fn, spec.max_fl_fn))
            if new_aperture == 0 and new_fl == 0:
                continue
            if (new_aperture == image.metadata.aperture and
                      new_fl == image.metadata.focal_length):
                continue
            if make_changes:
                pass
            elif QtWidgets.QMessageBox.question(
                    self,
                    translate('TechnicalTab', 'Update aperture & focal length'),
                    translate('TechnicalTab', 'Adjust image aperture and focal'
                              ' length to agree with lens specification?'),
                    QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No,
                    QtWidgets.QMessageBox.No
                    ) == QtWidgets.QMessageBox.No:
                return
            make_changes = True
            if new_aperture:
                image.metadata.aperture = new_aperture
            if new_fl:
                # only update 35mm equiv if already set
                if image.metadata.focal_length_35:
                    image.metadata.focal_length_35 = self.calc_35(
                        image.metadata, new_fl)
                image.metadata.focal_length = new_fl
        if make_changes:
            self._update_aperture()
            self._update_focal_length()
            self._update_focal_length_35()

def get_conversion_function(self, image, params):
        convert = super(
            TabWidget, self).get_conversion_function(image, params)
        if convert == 'omit':
            return convert
        max_size = 25 * 1024 * 1024
        size = os.stat(image.path).st_size
        if size < max_size:
            return convert
        dialog = QtWidgets.QMessageBox(parent=self)
        dialog.setWindowTitle(
            translate('GooglePhotosTab', 'Photini: large file'))
        dialog.setText(
            translate('GooglePhotosTab', '<h3>Large file.</h3>'))
        dialog.setInformativeText(
            translate('GooglePhotosTab',
                      'File "{0}" is over 25MB. Remember that Photini '
                      'uploads count towards storage in your Google Account. '
                      'Upload it anyway?').format(os.path.basename(image.path)))
        dialog.setIcon(QtWidgets.QMessageBox.Warning)
        dialog.setStandardButtons(
            QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.Ignore)
        dialog.exec_()
        return 'omit'

def unsaved_files_dialog(
            self, all_files=False, with_cancel=True, with_discard=True):
        """Return true if OK to continue with close or quit or whatever"""
        for image in self.images:
            if image.metadata.changed() and (all_files or image.selected):
                break
        else:
            return True
        dialog = QtWidgets.QMessageBox()
        dialog.setWindowTitle(self.tr('Photini: unsaved data'))
        dialog.setText(self.tr('<h3>Some images have unsaved metadata.</h3>'))
        dialog.setInformativeText(self.tr('Do you want to save your changes?'))
        dialog.setIcon(QtWidgets.QMessageBox.Warning)
        buttons = QtWidgets.QMessageBox.Save
        if with_cancel:
            buttons |= QtWidgets.QMessageBox.Cancel
        if with_discard:
            buttons |= QtWidgets.QMessageBox.Discard
        dialog.setStandardButtons(buttons)
        dialog.setDefaultButton(QtWidgets.QMessageBox.Save)
        result = dialog.exec_()
        if result == QtWidgets.QMessageBox.Save:
            self._save_files()
            return True
        return result == QtWidgets.QMessageBox.Discard

def do_not_close(self):
        if not self.upload_worker:
            return False
        dialog = QtWidgets.QMessageBox(parent=self)
        dialog.setWindowTitle(translate(
            'UploaderTabsAll', 'Photini: upload in progress'))
        dialog.setText(translate(
            'UploaderTabsAll',
            '<h3>Upload to {} has not finished.</h3>').format(self.service_name))
        dialog.setInformativeText(
            translate('UploaderTabsAll', 'Closing now will terminate the upload.'))
        dialog.setIcon(QtWidgets.QMessageBox.Warning)
        dialog.setStandardButtons(
            QtWidgets.QMessageBox.Close | QtWidgets.QMessageBox.Cancel)
        dialog.setDefaultButton(QtWidgets.QMessageBox.Cancel)
        result = dialog.exec_()
        return result == QtWidgets.QMessageBox.Cancel

def get_conversion_function(self, image, params):
        if not params['function']:
            return None
        convert = super(
            TabWidget, self).get_conversion_function(image, params)
        if convert == 'omit':
            return convert
        max_size = 2 ** 30
        size = os.stat(image.path).st_size
        if size < max_size:
            return convert
        dialog = QtWidgets.QMessageBox(parent=self)
        dialog.setWindowTitle(
            translate('FlickrTab', 'Photini: too large'))
        dialog.setText(
            translate('FlickrTab', '<h3>File too large.</h3>'))
        dialog.setInformativeText(
            translate('FlickrTab',
                      'File "{0}" has {1} bytes and exceeds Flickr\'s limit' +
                      ' of {2} bytes.').format(
                          os.path.basename(image.path), size, max_size))
        dialog.setIcon(QtWidgets.QMessageBox.Warning)
        dialog.setStandardButtons(QtWidgets.QMessageBox.Ignore)
        dialog.exec_()
        return 'omit'

def unsaved_files_dialog(
            self, all_files=False, with_cancel=True, with_discard=True):
        """Return true if OK to continue with close or quit or whatever"""
        for image in self.images:
            if image.metadata.changed() and (all_files or image.selected):
                break
        else:
            return True
        dialog = QtWidgets.QMessageBox()
        dialog.setWindowTitle(self.tr('Photini: unsaved data'))
        dialog.setText(self.tr('<h3>Some images have unsaved metadata.</h3>'))
        dialog.setInformativeText(self.tr('Do you want to save your changes?'))
        dialog.setIcon(QtWidgets.QMessageBox.Warning)
        buttons = QtWidgets.QMessageBox.Save
        if with_cancel:
            buttons |= QtWidgets.QMessageBox.Cancel
        if with_discard:
            buttons |= QtWidgets.QMessageBox.Discard
        dialog.setStandardButtons(buttons)
        dialog.setDefaultButton(QtWidgets.QMessageBox.Save)
        result = dialog.exec_()
        if result == QtWidgets.QMessageBox.Save:
            self._save_files()
            return True
        return result == QtWidgets.QMessageBox.Discard

size = os.stat(image.path).st_size
        if size < max_size:
            return convert
        dialog = QtWidgets.QMessageBox(parent=self)
        dialog.setWindowTitle(
            translate('GooglePhotosTab', 'Photini: large file'))
        dialog.setText(
            translate('GooglePhotosTab', '<h3>Large file.</h3>'))
        dialog.setInformativeText(
            translate('GooglePhotosTab',
                      'File "{0}" is over 25MB. Remember that Photini '
                      'uploads count towards storage in your Google Account. '
                      'Upload it anyway?').format(os.path.basename(image.path)))
        dialog.setIcon(QtWidgets.QMessageBox.Warning)
        dialog.setStandardButtons(
            QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.Ignore)
        dialog.exec_()
        return 'omit'