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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def export_profile(self):
 """ Export minimum needs to a json file. This method will save the current state of the minimum needs setup. Then open a dialog allowing the user to browse to the desired destination location and allow the user to save the needs as a json file. """

        file_name_dialog = QFileDialog(self)
        file_name_dialog.setAcceptMode(QFileDialog.AcceptSave)
        file_name_dialog.setNameFilter(self.tr('JSON files (*.json *.JSON)'))
        file_name_dialog.setDefaultSuffix('json')
        file_name = None
        if file_name_dialog.exec_():
            file_name = file_name_dialog.selectedFiles()[0]
        if file_name != '' and file_name is not None:
            self.minimum_needs.write_to_file(file_name)