仍然可以使用队列而不必摆脱所有
Process从属
stdout重定向来执行此操作。下面的解决方案使用
Queue子类来模仿
stdout。然后，该线程由一个线程监视，该线程寻找被泵送到文本小部件中的新文本。
import sysimport timefrom multiprocessing import Processfrom multiprocessing.queues import Queuefrom threading import Threadfrom Tkinter import *# This function takes the text widget and a queue as inputs.# It functions by waiting on new data entering the queue, when it # finds new data it will insert it into the text widget def text_catcher(text_widget,queue): while True: text_widget.insert(END, queue.get())# This is a Queue that behaves like stdoutclass StdoutQueue(Queue): def __init__(self,*args,**kwargs): Queue.__init__(self,*args,**kwargs) def write(self,msg): self.put(msg) def flush(self): sys.__stdout__.flush()def test_child(q): # This line only redirects stdout inside the current process sys.stdout = q # or sys.stdout = sys.__stdout__ if you want to print the child to the terminal print 'child running'def test_parent(q): # Again this only redirects inside the current (main) process # commenting this like out will cause only the child to write to the widget sys.stdout = qprint 'parent running' time.sleep(0.5) Process(target=test_child,args=(q,)).start()if __name__ == '__main__': gui_root = Tk() gui_txt = Text(gui_root) gui_txt.pack() q = StdoutQueue() gui_btn = Button(gui_root, text='Test', command=lambda:test_parent(q),) gui_btn.pack() # Instantiate and start the text monitor monitor = Thread(target=text_catcher,args=(gui_txt,q)) monitor.daemon = True monitor.start() gui_root.mainloop()
