问Python GnuPG密钥生成不起作用

EN

Key-Type: RSA
Key-Length: 4096
Passphrase: 1202
Name-Real: TestUser
Name-Email: test@gmail.com
Expire-Date: 2019-3-3
%commit

key not created

class GenKeyDialog(QtGui.QDialog, Ui_GPGGenerateWindow):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
        self.setupUi(self)
        self.gpg = gnupg.GPG(homedir='keys')
        self.gpg.encoding = 'utf-8'

        self.GenButton.clicked.connect(self.genkey)

    def genkey(self):
        type = "RSA"
        length = 4096
        name = str(self.NameEdit.text())
        email = str(self.EmailEdit.text())
        if str(self.PassEdit.text()) == str(self.RPassEdit.text()):
            passs = str(self.PassEdit.text())
        else:
            print "passwords do not match"
            return

        expire = str(self.ExpireEdit.text())
        input_data = self.gpg.gen_key_input(key_type=type, key_length=length, name_real=name, name_email=email, passphrase=passs, expire_date=expire)
        print input_data
        key = self.gpg.gen_key(input_data)
        print key


class Main_window_ex(QMainWindow, Ui_MainWindow):
    def createPGP(self):
        dialog = GenKeyDialog()
        ret = dialog.exec_()


    def __init__(self, parent = None):
        """
        Default Constructor. It can receive a top window as parent. 
        """