使用pyqtSignal中出現"AttributeError: 'PyQt5.QtCore.pyqtSignal' object has no attribute 'connect'"

對PyQT的自定義信號還不太熟悉，今天在使用中出現錯誤

AttributeError: 'PyQt5.QtCore.pyqtSignal' object has no attribute 'connect'

原來是定義的位置出錯了
應該是：

>>> class MyForm(QtWidgets.QMainWindow):
>>> 	sig = pyqtSignal()
>>>     def __init__(self, user, password, address, port, databass):
>>>         super().__init__()
>>> 		self.sig.connect(xxxx)

而不應該是：

>>> class MyForm(QtWidgets.QMainWindow):
>>>     def __init__(self, user, password, address, port, databass):
>>>         super().__init__()
>>> 		self.sig = pyqtSignal()
>>> 		self.sig.connect(xxxx)

參考：https://blog.csdn.net/jeekmary/article/details/79675917