在Ubuntu16.04中安装python3-pip的已损坏软件包

Question

我正在尝试将python3-pip安装为

func toggleCheckmark(_ checkmark: UIButton) {
    if checkmark == self.checkmark1 {
        self.selectCheckmark1()
        self.deselectCheckmark2()
    } else if checkmark == self.checkmark2 {
        self.selectCheckmark2()
        self.deselectCheckmark1()
    }
}

然后我有错误

func toggleCheckmark(_ checkmark: UIButton) {
    self.selectCheckmark(self.checkmark1, on: checkmark == self.checkmark1)
    self.selectCheckmark(self.checkmark2, on: checkmark == self.checkmark2)
}