python pyqt5 信号连接、断开、发射

# 声明一个无参数的信号
signal1 = pyqtSignal()

# 声明带一个int类型参数的信号
signal2 = pyqtSignal(int)

def __init__(self,parent=None):
    super(SignalClass,self).__init__(parent)

    # 信号sin1连接到sin1Call和sin2Call这两个槽
    self.signal1.connect(self.sin1Call)
    self.signal1.connect(self.sin2Call)

    # 信号sin2连接到信号sin1
    self.signal2.connect(self.signal1)

    # 信号发射
    self.signal1.emit()
    self.signal2.emit(1)

    # 断开sin1、sin2信号与各槽的连接
    self.signal1.disconnect(self.sin1Call)
    self.signal1.disconnect(self.sin2Call)
    self.signal2.disconnect(self.signal1)

    # 信号sin1和sin2连接同一个槽sin1Call
    self.signal1.connect(self.sin1Call)
    self.signal2.connect(self.sin1Call)

    # 信号再次发射
    self.signal1.emit()
    self.signal2.emit(1)

def sin1Call(self):
    print("signal-1 emit")

def sin2Call(self):
    print("signal-2 emit")