PyQt5信号通信错误

Question

我需要你的帮助解决我遇到的以下问题。我有两个Python文件，Main.py和Module.py，它们需要使用PyQt5信号进行通信。下面是代码:

Main.py

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from MyGUI import main_window_GUI
from Modules import Module.py
class MainWindow(QMainWindow, main_window_GUI.Ui_main_window):
    def __init__(self):
        QMainWindow.__init__(self)
        main_window_GUI.Ui_main_window.__init__(self)
        self.setupUI(self)
        sub_win = QMdiSubWindow()
        sub_win.setWidget(Module.moduleWindow())
        self.mdi.addSubWindow(sub_win)
        # this part reports error saying:
        # 'PyQt5.QtCore.pyqtSignal' object has no attribute 'connect'
        Module.moduleWindow.my_signal.connect(self.do_something)
    def do_something(self):
        pass

Module.py

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from MyGUI import module_window_GUI
class moduleWindow(QMainWindow, module_window_GUI.Ui_module_window):
    my_signal = pyqtSignal()
    def __init__(self):
        QMainWindow.__init__(self)
        module_window_GUI.Ui_module_window.__init__(self)
        self.setupUI(self)
        # the rest is not important
    # what is important is th following function
    def closeEvent(self, event):
        # when the user closes this subwindow signal needs to
        # be emitted so that the MainWindow class knows that
        # it's been closed.
        self.my_signal.emit()
        event.accept()

任何形式的帮助都非常受欢迎。

Answer 1

您需要连接来自moduleWindow类实例的信号，而不是来自类本身:

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from MyGUI import main_window_GUI
from Modules import Module
class MainWindow(QMainWindow, main_window_GUI.Ui_main_window):
    def __init__(self):
        QMainWindow.__init__(self)
        main_window_GUI.Ui_main_window.__init__(self)
        self.setupUI(self)
        sub_win = QMdiSubWindow()
        module_window = Module.moduleWindow()
        sub_win.setWidget(module_window)
        self.mdi.addSubWindow(sub_win)
        module_window.my_signal.connect(self.do_something)
    @pyqtSlot()
    def do_something(self):
        pass

我还建议用pyqtSlot修饰do_something方法，如文档