open file dialog on button click pyqt5

1def open_file(self):
2	def open(self):
3        path = QFileDialog.getOpenFileName(self, 'Open a file', '',
4                                        'All Files (*.*)')
5        if path != ('', ''):
6            print(path[0])

1def open(self):
2    path = QFileDialog.getOpenFileName(self, 'Open a file', '',
3                                     'All Files (*.*)')
4    if path != ('', ''):
5		print(path[0])