How to Enable Button if there is Item in ComboBox in pyqt5?

Question

Hi, in this image i want to enable start button when USB name appear in combo-Box and if the name does not appear the button should disabled automatically, Here is My Code.

def x(self):
      if (self.comboBox_3.currentIndex() == -1):
          self.pushButton_5.setEnabled(False)
      else:
          self.pushButton_5.setEnabled(True)

Answer 1

You must use the currentIndexChanged signal to evaluate that logic:

    # __init__ method
    # ...
    self.comboBox_3.currentIndexChanged[int].connect(self.on_currentIndexChanged)

def on_currentIndexChanged(self, index):
    self.pushButton_5.setEnabled(index != -1)