Python - 如何顯示窗口+打印文本？哪裏只有打印但沒有顯示窗口

Question

如何顯示窗口+打印那個文本？如果我有我的while循環，它不再顯示窗口。

import sys 
import datetime 
import time 
from PyQt4 import QtCore, QtGui 

class Main(QtGui.QMainWindow): 
    def __init__(self, parent=None): 
    super(Main, self).__init__(parent)  
    self.b = QtGui.QPushButton("exit", self, clicked=self.close) 
    self.c = QtGui.QLabel("Test", self) 

if __name__ == "__main__": 
    app=QtGui.QApplication(sys.argv) 
    myapp=Main() 
    myapp.show()  
    while True: 
    time.sleep(2) 
    print "Print this + Show the Window???!!!" 
    sys.exit(app.exec_()) 

嘗試：

import sys 
import datetime 
import time 
from PyQt4 import QtCore, QtGui 

class Main(QtGui.QMainWindow): 
    def __init__(self, parent=None): 
    super(Main, self).__init__(parent)  
    self.b = QtGui.QPushButton("exit", self, clicked=self.close) 
    self.c = QtGui.QLabel("Test", self) 

    def myRun(): 
    while True: 
     time.sleep(2) 
     print "Print this + Show the Window???!!!"  

if __name__ == "__main__": 
    app=QtGui.QApplication(sys.argv) 
    myapp=Main() 
    myapp.show()  

    thread = QtCore.QThread() 
    thread.run = lambda self: myRun() 
    thread.start()  
    sys.exit(app.exec_()) 

輸出：

類型錯誤：（）採用完全1參數（0給出）

Answer 1

幾個問題：1）你沒有正確調用或初始化線程。 2）當另一個線程正在運行時，您需要告訴您的主線程繼續處理事件3）您的標籤懸停在「退出」按鈕上，因此您將無法點擊它！

import sys 
import datetime 
import time 
from PyQt4 import QtCore, QtGui 

class Main(QtGui.QMainWindow): 
    def __init__(self, parent=None): 
    super(Main, self).__init__(parent)  
    self.b = QtGui.QPushButton("exit", self, clicked=self.close) 

    def myRun(self): 
    while True: 
     time.sleep(2) 
     print "Print this + Show the Window???!!!"  

if __name__ == "__main__": 
    app=QtGui.QApplication(sys.argv) 
    myapp=Main() 
    myapp.show()  

    thread = QtCore.QThread() 
    thread.run = lambda myapp=myapp: myapp.myRun() 
    thread.start()  

    app.connect(app, QtCore.SIGNAL("lastWindowClosed()"), app, QtCore.SLOT("quit()")) 

    sys.exit(app.exec_()) 

    while thread.isAlive(): 
    #Make sure the rest of the GUI is responsive 
    app.processEvents() 

[PyQt的？如何處理迴路主]的

Answer 2

lambda self: myRun()試圖調用全局函數myRun()。嘗試

lambda myapp=myapp: myapp.myRun() 

改爲。奇怪的分配將創建一個默認參數，因爲thread.run()沒有得到一個。