PyQt的GUI忽然不響應點擊後按鈕2兩次使用的QThread

Question

我嘗試創建QThread類我的過程中，當我點擊生成按鈕，它不會在我QTextEdit顯示任何東西，當我再次單擊該按鈕我的GUI突然沒有響應。

我的代碼

更新的代碼

import sys 
from PyQt4.QtCore import * 
from PyQt4.QtGui import * 
import ipaddress 

class Stream(QObject): 
    newText = pyqtSignal(str) 

    def write(self, text): 
     self.newText.emit(str(text)) 

    def flush(self): 
     pass 

class MyClass(object): 
    def __init__(self, device_type=None, ip=None, username=None, password=None, secret=None, command=None): 
     self.device_type = device_type 
     self.ip = ip 
     self.username = username 
     self.password = password 
     self.secret = secret 
     self.command = command 

class sshConnection(QThread): 
    def __init__(self): 
     QThread.__init__(self) 

    def __del__(self): 
     self.wait() 

    def runSSH(self): 
     #doo process 
     print('Haii') 
     for x in range(100): 
      print(x) 


class Widget(QWidget): 
    def __init__(self, parent=None): 
     QWidget.__init__(self, parent=parent) 
     self.device_list = [] # object array 
     self.setWindowTitle("Network Automation") 
     self.setFixedSize(350,500) 
     ############################# Input IP 

     sys.stdout = Stream(newText=self.onUpdateText) 

     # Device Type 
     lb_device_list = QLabel(self) 
     lb_device_list.setText('Device Type') 
     self.cb_device_list = QComboBox(self) 
     self.cb_device_list.addItem('cisco_ios') 
     self.cb_device_list.addItem('cisco_s300') 

     # Ip Device 
     lb_ip = QLabel(self) 
     lb_ip.setText('IP Address') 
     self.le_ip = QLineEdit(self) 
     self.le_ip.setText('') 
     self.le_ip.setPlaceholderText('Input Device IP') 
     self.le_ip.setFixedWidth(150) 

     # username 
     lb_username = QLabel(self) 
     self.le_username = QLineEdit(self) 
     lb_username.setText('Username') 
     self.le_username.setText('') 
     self.le_username.setPlaceholderText('Input Username') 
     self.le_username.setFixedWidth(150) 

     # password 
     lb_password = QLabel(self) 
     self.le_password = QLineEdit(self) 
     lb_password.setText('Password') 
     self.le_password.setText('') 
     self.le_password.setPlaceholderText('Input Password') 
     self.le_password.setFixedWidth(150) 

     # Privilage Password 
     lb_enable = QLabel(self) 
     lb_enable.setText('Privilege Mode Password') 
     self.le_enable = QLineEdit(self) 
     self.le_enable.setText('') 
     self.le_enable.setPlaceholderText('Input Enable Password') 
     self.le_enable.setFixedWidth(150) 

     # button generate and add 
     btgenerate = QPushButton(self) 
     btgenerate.setText('Generate') 
     btgenerate.setFixedWidth(70) 
     btadd = QPushButton(self) 
     btadd.setText('Add') 

     # button delete 
     btdel = QPushButton(self) 
     btdel.setFixedWidth(70) 
     btdel.setText('Remove') 

     # line 
     line = QFrame(self) 
     line.setFrameShape(QFrame.VLine) 
     line.setFrameShadow(QFrame.Sunken) 
     line.setLineWidth(3) 

     #line 2 
     line2 = QFrame(self) 
     line2.setFrameShape(QFrame.HLine) 
     line2.setFrameShadow(QFrame.Sunken) 
     line2.setLineWidth(3) 

     ########################### Layout Ip Device List 

     lb3 = QLabel(self) 
     lb3.setText('IP Device List') 
     self.ip_device_list = QListWidget(self) 
     self.ip_device_list.setFixedWidth(150) 
     # self.combobox_ip_list = QComboBox(self) 
     # self.combobox_ip_list.setFixedWidth(170) 

     ############################## SubLayout and Layout 
     hblayout = QHBoxLayout() 
     hblayout.addWidget(btgenerate) 
     hblayout.addWidget(btadd) 

     ############################### Processs 
     processlabel = QLabel("Process",self) 

     self.process = QTextEdit(self) 
     self.process.setLineWrapColumnOrWidth(400) 
     self.process.setLineWrapMode(QTextEdit.FixedPixelWidth) 
     self.process.setReadOnly(True) 


     sublayout = QVBoxLayout() 
     sublayout.addWidget(lb_device_list) 
     sublayout.addWidget(self.cb_device_list) 
     sublayout.addWidget(lb_ip) 
     sublayout.addWidget(self.le_ip) 
     sublayout.addWidget(lb_username) 
     sublayout.addWidget(self.le_username) 
     sublayout.addWidget(lb_password) 
     sublayout.addWidget(self.le_password) 
     sublayout.addWidget(lb_enable) 
     sublayout.addWidget(self.le_enable) 
     sublayout.addLayout(hblayout) 

     sublayout2 = QVBoxLayout() 
     sublayout2.addWidget(lb3) 
     sublayout2.addWidget(self.ip_device_list) 
     #sublayout2.addWidget(self.combobox_ip_list) 
     sublayout2.addWidget(btdel) 
     sublayout2.addStretch(1) 

     sublayout3 = QVBoxLayout() 
     sublayout3.addWidget(processlabel) 
     sublayout3.addWidget(self.process) 

     layout = QGridLayout(self) 
     layout.addLayout(sublayout, 0, 0) 
     layout.addWidget(line, 0, 1) 
     layout.addWidget(line2, 1, 0, 1, 3) 
     #layout.addWidget(processlabel,2,0) 
     layout.addLayout(sublayout3,2,0,2,3) 
     layout.addLayout(sublayout2, 0, 2) 

     btadd.clicked.connect(self.addDevice) 
     btdel.clicked.connect(self.remove) 
     btgenerate.clicked.connect(self.runThread) 

    def onUpdateText(self, text): 
     cursor = self.process.textCursor() 
     cursor.movePosition(QTextCursor.End) 
     cursor.insertText(text) 
     self.process.setTextCursor(cursor) 
     self.process.ensureCursorVisible() 

    # ----------- AddDevice Process 

    def addDevice(self): 
     try: 
      ip = self.le_ip.text() 
      ipaddress.ip_address(ip) 
      device_type = str(self.cb_device_list.currentText()) 
      username = self.le_username.text() 
      password = self.le_password.text() 
      secret = self.le_enable.text() 
      command = 'show tech' 
      coomand2 = '' 
      self.device_list.append(MyClass(device_type, ip, username, password, secret, command)) 

      # self.combobox_ip_list.addItem(ip)# Add Ip to ComboBox 
      self.ip_device_list.addItem(ip) 

      self.le_ip.clear() 
      self.le_username.clear() 
      self.le_password.clear() 
      self.le_enable.clear() 
      for list in self.device_list: 
       print(list.ip, list.device_type) 
     except ValueError: 
      print("insert you're ip correctly") 
      QMessageBox.question(self, 'Warning', "Insert You're IP Corecctly") 

    def remove(self): 
     index = self.ip_device_list.currentRow() 
     if index != -1: 
      self.ip_device_list.takeItem(index) 
      del self.device_list[index] 

    def runThread(self): 
     self.run_thread = sshConnection() 
     self.run_thread.finished.connect(app.exit) 
     self.run_thread.start() 

app = QApplication(sys.argv) 
app.setStyle('cleanlooks') 
window = Widget() 
window.show() 
sys.exit(app.exec_()) 

Answer 1

QThread希望你實現run方法，我認爲這是一樣的runSSH但它不是，你可以做的是在運行方法中調用它，在下面顯示的測試中，我刪除了行self.run_thread.finished.connect(app.exit)，因爲只要打印作業不需要很長時間，它就會關閉。

class sshConnection(QThread): 
    def __init__(self): 
     QThread.__init__(self) 

    def __del__(self): 
     self.wait() 

    def run(self): 
     self.runSSH() 

    def runSSH(self): 
     #doo process 
     print('Haii') 
     for x in range(100): 
      print(x)